Interesting dealer visit...

[phattpat]

I apologize if this has been discussed before - I did a quick search and couldn't find anything. Anyway...

So, I've had the SXT Mag for a few weeks now, and love it. I bought it used from a DCX employee, with about 18k on the clock. I noticed after having it a bit, that on the highway at around 60mph in overdrive (2k rpms, +/-), I'd get a really bad vibration through the car. I knew right away that this was not a tire ballance problem. It resonated throughout the whole cabin of the car very strongly, and if I depressed the gas pedal more (still keeping it in o.d.), the vibrations would get worse. I could go the same speed at different rpms, and it would not vibrate like that. I literally thought the wheels were about to fall off. I rotated all the tires, reballanced them myself (at work), and even had Discount Tire ballance them... and the same thing still happened.

So, I kind of deal with it for a few weeks, and then the other day, I get a check engine light. I'd been wanting to take it to the dealer anyway, just to make sure the car was up to snuff on recalls/tsbs/etc., and the light was good motivation to do so. I know one of the service reps at this particular dealer, and know he'll take care of the car.

Two days later, I get the car back. The error code was P0306 - Misfire. My guy told me that the issue is usually caused by excessive carbon build up on the valves, which was a *common* 'issue' with the 3.5L. He said that due to the design of the cylinder head, carbon was prone to build up on the valves and the exhaust passages leading out of the cylinder head, which could cause the valves to not seat properly, cause misfires, etc. The fix was to 'de-carbon' the valves, and 'rotate the valves'. Not move them from cylinder to cylinder, but actually spin them in place (which I thought most valves do by themselves anyway??). I believe the decarbon process they used this time was to 'soak' the engine. He said if/when it happens again, they usually will do the same thing but may include a valve spring replacement. And, if/when it happens after that... it'd probably be a cyl head swap.

Cool... just what I want to hear about my new car.

He went on to say that they've had that issue with just about every 3.5L-powered DCX vehicle so far, and that it's usually pretty recurring. I asked if there was anything I could do to help prevent that condition - ie, run fuel injector cleaner or Techron regularly... he said: "Nope...not much you can do." He mentioned that the misfire/carbon issue was also 'probably' the cause of my vibration problems, as they could not replicate it after the decarbon-izing of the motor (but they DID notice the vibe before the engine repair).

SO... that's about the whole long story. What do you guys think? I haven't had the car up to speed to verify that the vibrations are gone, but will in the morning on the way to work. I'm kind of upset that the carbon problem is because of a design issue with the cylinder head, and as far as I can tell, this is a problem we're just going to have to live with.

[done]

I apologize if this has been discussed before - I did a quick search and couldn't find anything. Anyway...

So, I've had the SXT Mag for a few weeks now, and love it. I bought it used from a DCX employee, with about 18k on the clock. I noticed after having it a bit, that on the highway at around 60mph in overdrive (2k rpms, +/-), I'd get a really bad vibration through the car. I knew right away that this was not a tire ballance problem. It resonated throughout the whole cabin of the car very strongly, and if I depressed the gas pedal more (still keeping it in o.d.), the vibrations would get worse. I could go the same speed at different rpms, and it would not vibrate like that. I literally thought the wheels were about to fall off. I rotated all the tires, reballanced them myself (at work), and even had Discount Tire ballance them... and the same thing still happened.

So, I kind of deal with it for a few weeks, and then the other day, I get a check engine light. I'd been wanting to take it to the dealer anyway, just to make sure the car was up to snuff on recalls/tsbs/etc., and the light was good motivation to do so. I know one of the service reps at this particular dealer, and know he'll take care of the car.

Two days later, I get the car back. The error code was P0306 - Misfire. My guy told me that the issue is usually caused by excessive carbon build up on the valves, which was a *common* 'issue' with the 3.5L. He said that due to the design of the cylinder head, carbon was prone to build up on the valves and the exhaust passages leading out of the cylinder head, which could cause the valves to not seat properly, cause misfires, etc. The fix was to 'de-carbon' the valves, and 'rotate the valves'. Not move them from cylinder to cylinder, but actually spin them in place (which I thought most valves do by themselves anyway??). I believe the decarbon process they used this time was to 'soak' the engine. He said if/when it happens again, they usually will do the same thing but may include a valve spring replacement. And, if/when it happens after that... it'd probably be a cyl head swap.

Cool... just what I want to hear about my new car.

He went on to say that they've had that issue with just about every 3.5L-powered DCX vehicle so far, and that it's usually pretty recurring. I asked if there was anything I could do to help prevent that condition - ie, run fuel injector cleaner or Techron regularly... he said: "Nope...not much you can do." He mentioned that the misfire/carbon issue was also 'probably' the cause of my vibration problems, as they could not replicate it after the decarbon-izing of the motor (but they DID notice the vibe before the engine repair).

SO... that's about the whole long story. What do you guys think? I haven't had the car up to speed to verify that the vibrations are gone, but will in the morning on the way to work. I'm kind of upset that the carbon problem is because of a design issue with the cylinder head, and as far as I can tell, this is a problem we're just going to have to live with.

I have been on this forum for 18 months and I have never heard that "story" I also have prevoulsy owned a 3.5 LH and currently have a 3.5 in the wife's van. No such crap with mine.

[67alecto]

There are a lot of SXT owners on this board, and I don't think I've ever heard of this before.

[ZMagnum]

This is the first time I've heard of this issue. Hopefully my high speed highway driving blows some of that carbon out. I've heard cars that are only driven in the city stop-n-go traffic can get carbon build-up. When I worked for a police department they used to take their patrol cars up on the Interstate every once in a while for a carbon cleaning.

[NC-SXT]

I believe that dealer is full of crapola. Never heard about this on the 3.5l and they have had them a good while. I would check with other dc forums and see if anyof this is remotely true. My guess not.

[fnkychkn]

you guys are too quick with the clubs and pitchforks. although i haven't heard of this happening on an LX yet, this problem has plagued 3.5L and 4.0L engines for the last eight years or so. weak or out of spec valve springs may be the cause of carbon build-up on the exhaust valve stems, resulting in misfires.

here are excerpts from TSBs:

TSB 09-002-03
SUBJECT:
Engine Stumble/Misfire - MIL Illumination
OVERVIEW:
This bulletin involves decarbonizing the combustion chamber and installing
new exhaust valve springs.
MODELS:
1998 - 2004 (LH) 300M/Concorde/Intrepid/LHS
1999 - 2002 (PR) Prowler
NOTE: THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO APRIL
1, 2003 (MDH 0401XX) EQUIPPED WITH A 3.2L OR 3.5L ENGINE (SALES
CODES EGC, EGE, EGG, EGJ, EGK, EGW)
SYMPTOM/CONDITION:
Engine stumble and/or misfire. More noticeable during a light throttle tip-in or when
transaxle goes into lockup (approximately 47 m.p.h.). MIL illumination with Diagnostic
Trouble Codes (DTCs) P0300 through P0306, individual or multiple cylinder misfire.

TSB 09-003-03
SUBJECT:
4.0L Multiple Cylinder Misfire
OVERVIEW:
This bulletin involves inspection of all engine exhaust valves and a decarbonizing
procedure if necessary.
MODELS:
1999 - 2004 (WJ) Grand Cherokee (All Markets)
2001 - 2004 (WG) Grand Cherokee (International Markets)
1999 - 2004 (TJ) Wrangler
1999 - 2001 (XJ) Cherokee
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A
4.0L ENGINE (SALES CODE = ERH).
SYMPTOM/CONDITION:
The customer may experience an incident of engine misfire during certain vehicle
operating conditons. The misfire may occur when the vehicle is operated between
80 - 112 KPH (50 - 70 MPH) and under light loading conditions, e.g. slight uphill
road grades. This condition may occur at all ambient conditions, but is more
noticeable when ambient conditons are less than 0 C (32 F).
If the vehicle is equipped with On-Board Diagnostic (OBD), a MIL illumination may also
have occurred due to Diagnostic Trouble Code (DTC) P0300 - Mulitiple Cylinder Misfire.
Various single cylinder misfire DTC’s may also be present. If the frequency of misfire is
high the Powertrain Control Module (PCM) may place the engine in “Limp-In” mode.
The misfire condition may be caused by one or more engine exhaust valves that are
slow to close. Late closure of an exhaust valve may be the result of no valve rotation
and associated build up of carbon on the exhaust valve stem.

[HEMIwoman]

GO FNKY...you are the man...the man with the info! :)

[Fiveoh]

fnkychkn,

Are there any TSB's on the current 3.5L about this issue? That TSB states that engines built prior to April 2003 experience this problem. However, Mags weren't built then. Are they using the same old engines from 2003 in our new 2005 Mags?

[fnkychkn]

fnkychkn,

Are there any TSB's on the current 3.5L about this issue? That TSB states that engines built prior to April 2003 experience this problem. However, Mags weren't built then. Are they using the same old engines from 2003 in our new 2005 Mags?
as a matter of fact, there is:

TSB 09-005-05 dated dec/2/05

SUBJECT:

Multiple Cylinder Misfire Or Rough Idle

OVERVIEW:

This bulletin involves rotating all engine exhaust valves, decarbonizing the combustion

chamber.

MODELS:

2004 - 2006 (CS) Pacifica

2005 - 2006 (LX) Chrysler 300/Magnum/Charger

NOTE: This bulletin applies to all CS vehicles built after February 1, 2004 (MDH

0201XX) equipped with a 3.5L engine (Sales Code EGN).

NOTE: This bulletin applies to all LX vehicles equipped with a 3.5L engine (sales

code EGG).

SYMPTOM/CONDITION:

The customer may experience occasional engine misfire during certain vehicle operating

conditions.

A MIL illumination may also have occurred due to Diagnostic Trouble Code (DTC) P0300 -

Multiple Cylinder Misfire. Various single cylinder misfire DTC's may also be present. If the

frequency of misfire is high the Powertrain Control Module (PCM) may place the engine in

“Limp-In” mode.

The misfire condition may be caused by one or more engine exhaust valves that are slow

to close. Late closure of an exhaust valve may be the result of no valve rotation and the

associated build up of carbon on the exhaust valve stem.

[ZMagnum]

phattpat what are your driving habits? Do you get up on the highway a lot? Any WOT? Also, what about fuel? 89 octane?

[phattpat]

Hey guys - thanks for all the feedback! I knew a lot of you on here have had your 3.5L Mags/300s for a while with no problems... it's refreshing to hear that not many other people have experienced this yet.

Fnkychkn- thanks for the awesome info!

zxlwno - driving habits are varied...but I do tend to be aggressive at times. WOT on occasion, pretty normal highway/city stuff other than that. But as I mentioned, no telling how the previous owner drove it. Coulda been a grandpa that never got above 3k rpm, for all I know. The good thing about it being an ex-DCX corporate vehicle is that I KNOW it was cared for. If you were an employee in the company car program, you were *required* to service it at a specific location in Auburn Hills, which is not a dealership (I used to work at DCX HQ). If you didn't follow the maintenance schedule, the car could be taken from you and you could be removed from the car program.

[Fiveoh]

as a matter of fact, there is:

TSB 09-005-05 dated dec/2/05



SUBJECT:



Multiple Cylinder Misfire Or Rough Idle



OVERVIEW:



This bulletin involves rotating all engine exhaust valves, decarbonizing the combustion chamber.



MODELS:



2004 - 2006 (CS) Pacifica

2005 - 2006 (LX) Chrysler 300/Magnum/Charger




NOTE: This bulletin applies to all CS vehicles built after February 1, 2004 (MDH

0201XX) equipped with a 3.5L engine (Sales Code EGN).

NOTE: This bulletin applies to all LX vehicles equipped with a 3.5L engine (sales code EGG).






SYMPTOM/CONDITION:


The customer may experience occasional engine misfire during certain vehicle operating conditions.


A MIL illumination may also have occurred due to Diagnostic Trouble Code (DTC) P0300 - Multiple Cylinder Misfire. Various single cylinder misfire DTC's may also be present. If the frequency of misfire is high the Powertrain Control Module (PCM) may place the engine in “Limp-In” mode.

The misfire condition may be caused by one or more engine exhaust valves that are slow to close. Late closure of an exhaust valve may be the result of no valve rotation and the associated build up of carbon on the exhaust valve stem.



Thanks dude, gonna keep this thread on file just in case.

[COLORADOMAGNUM]

Thanks for the info, Fnky. No problems with my 3.5 yet, but good to know about this.

[l1tech]

you guys are too quick with the clubs and pitchforks. although i haven't heard of this happening on an LX yet, this problem has plagued 3.5L and 4.0L engines for the last eight years or so. weak or out of spec valve springs are the cause of carbon build-up on the exhaust valve stems, resulting in misfires.

here are excerpts from TSBs:

TSB 09-002-03
SUBJECT:
Engine Stumble/Misfire - MIL Illumination
OVERVIEW:
This bulletin involves decarbonizing the combustion chamber and installing
new exhaust valve springs.
MODELS:
1998 - 2004 (LH) 300M/Concorde/Intrepid/LHS
1999 - 2002 (PR) Prowler
NOTE: THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO APRIL
1, 2003 (MDH 0401XX) EQUIPPED WITH A 3.2L OR 3.5L ENGINE (SALES
CODES EGC, EGE, EGG, EGJ, EGK, EGW)
SYMPTOM/CONDITION:
Engine stumble and/or misfire. More noticeable during a light throttle tip-in or when
transaxle goes into lockup (approximately 47 m.p.h.). MIL illumination with Diagnostic
Trouble Codes (DTCs) P0300 through P0306, individual or multiple cylinder misfire.

TSB 09-003-03
SUBJECT:
4.0L Multiple Cylinder Misfire
OVERVIEW:
This bulletin involves inspection of all engine exhaust valves and a decarbonizing
procedure if necessary.
MODELS:
1999 - 2004 (WJ) Grand Cherokee (All Markets)
2001 - 2004 (WG) Grand Cherokee (International Markets)
1999 - 2004 (TJ) Wrangler
1999 - 2001 (XJ) Cherokee
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A
4.0L ENGINE (SALES CODE = ERH).
SYMPTOM/CONDITION:
The customer may experience an incident of engine misfire during certain vehicle
operating conditons. The misfire may occur when the vehicle is operated between
80 - 112 KPH (50 - 70 MPH) and under light loading conditions, e.g. slight uphill
road grades. This condition may occur at all ambient conditions, but is more
noticeable when ambient conditons are less than 0 C (32 F).
If the vehicle is equipped with On-Board Diagnostic (OBD), a MIL illumination may also
have occurred due to Diagnostic Trouble Code (DTC) P0300 - Mulitiple Cylinder Misfire.
Various single cylinder misfire DTC’s may also be present. If the frequency of misfire is
high the Powertrain Control Module (PCM) may place the engine in “Limp-In” mode.
The misfire condition may be caused by one or more engine exhaust valves that are
slow to close. Late closure of an exhaust valve may be the result of no valve rotation
and associated build up of carbon on the exhaust valve stem.

I just had this very same problem on a Jeep with a 4.0L today that another shop diagnosed as a burnt valve. It is a more common occurance than you may think.

[MooNDoGGie]

I wish I would have had knowledge of this crap before I bought the 3.5L (crap design) engine. If I had I would have opted for the hemi!

Damn! Who puts engines in vehicles that have the same (incredible) problem for the past 5 years!

I'm pissed about this!

[Lburou]

as a matter of fact, there is:

TSB 09-005-05 dated dec/2/05

SUBJECT:
Multiple Cylinder Misfire Or Rough Idle




OVERVIEW:



This bulletin involves rotating all engine exhaust valves, decarbonizing the combustion chamber.




MODELS:



2004 - 2006 (CS) Pacifica
2005 - 2006 (LX) Chrysler 300/Magnum/Charger




NOTE: This bulletin applies to all CS vehicles built after February 1, 2004
(MDH 0201XX) equipped with a 3.5L engine (Sales Code EGN).

NOTE: This bulletin applies to all LX vehicles equipped with a 3.5L engine (sales code EGG).




SYMPTOM/CONDITION:



The customer may experience occasional engine misfire during certain vehicle
operating conditions.

A MIL illumination may also have occurred due to Diagnostic Trouble Code (DTC) P0300 -

Multiple Cylinder Misfire. Various single cylinder misfire DTC's may also be present. If the

frequency of misfire is high the Powertrain Control Module (PCM) may place the engine in

“Limp-In” mode.

The misfire condition may be caused by one or more engine exhaust valves that are slow

to close. Late closure of an exhaust valve may be the result of no valve rotation and the associated build up of carbon on the exhaust valve stem.

Dissappointed to read about this....

Fnkychkn, I've depended on Techron fuel system cleaner to keep this sort of thing from happeneing and do not have any similar symptom in my SXT at this time....What do you think about prophylactic doses of Techron Fuel system cleaner periodically?

Also, fnkychkn, will a product like Sea Foam adequately remove this carbon buildup in our 3.5L engines? I also have a spray can of GM Top Engine Cleaner (#1052626), will that do?

I drove this basic engine in my LHS for 8 years and 140K. I have alot of confidence it its reliability. Only problem I had with the old engine in the first 125k was fixed when they put the coils above each plug.

[BluMag]

I have been having some really wierd vibrations throughout the car while at stoplights over the last week or so. This has me wondering, it has only happened 4 or 5 times so I was just going to give it some time and see what happens. I knew I should have bought the Hemi.

[fnkychkn]

This condition results from the engine not beign allowed to run at engine RPM's that
are greater than 3,500 RPM. At 3,500 RPM or higher the engine exhaust valves will
rotate if not impeded by high carbon deposits. Low engine RPM's and high carbon
deposits are associated with short trip driving where the engine is not allowed to fully
warm to normal engine operating temperatures. Cold ambient temperatures will
increase engine warm-up time and increase the likelihood of carbon deposit build-up
on the stem of the engine exhaust valve. Fuel detergent quality may also contribute to
the condition. you may want to try a different brand of fuel, and stop driving like an old lady!:lol:

[ZMagnum]

Which is why most of us have not heard this problem. Who here never gets above 3,500 RPM's? These engines like to be driven hard.

This condition results from the engine not beign allowed to run at engine RPM's that
are greater than 3,500 RPM. At 3,500 RPM or higher the engine exhaust valves will
rotate if not impeded by high carbon deposits. Low engine RPM's and high carbon
deposits are associated with short trip driving where the engine is not allowed to fully
warm to normal engine operating temperatures. Cold ambient temperatures will
increase engine warm-up time and increase the likelihood of carbon deposit build-up
on the stem of the engine exhaust valve. Fuel detergent quality may also contribute to
the condition. you may want to try a different brand of fuel, and stop driving like an old lady!:lol:

[boggart]

3500 RPM? ROFL!!! Ok, I should have nothing to worry about.

[ASU_Magnum]

lol so there is actually an advantage to flooring it off every stoplight, stopsign, freeway on ramp, and when going to pass.

This condition results from the engine not beign allowed to run at engine RPM's that
are greater than 3,500 RPM. At 3,500 RPM or higher the engine exhaust valves will
rotate if not impeded by high carbon deposits. Low engine RPM's and high carbon
deposits are associated with short trip driving where the engine is not allowed to fully
warm to normal engine operating temperatures. Cold ambient temperatures will
increase engine warm-up time and increase the likelihood of carbon deposit build-up
on the stem of the engine exhaust valve. Fuel detergent quality may also contribute to
the condition. you may want to try a different brand of fuel, and stop driving like an old lady!:lol:

[MooNDoGGie]

Hmmmm I tend to get up a little past 3500 rpm :) so I guess i over reacted :)

[ZMagnum]

I go over 3,500 RPMs just backing out of my driveway.

[phattpat]

I go over 3,500 RPMs just backing out of my driveway.

ahahaha.... that was good!

[Shelby]

Fuel detergent quality may also contribute to
the condition. you may want to try a different brand of fuel, and stop driving like an old lady!:lol:

The top tier gas program addresses some issues with fuel additives related to injectors and intake valve issues. Although the program does not appear to have any standards for exhaust valve deposits the fuels with better detergents may help. Also, these fuels are not allowed to contain any metallic additives (including MMT which is specifically discouraged in the 2005 Magnum owner's manual). MMT is a legal additive in the US (and manufactured here) but I don't believe it is used in the US much. I believe it is used much more frequeuntly in Canada. (There are some politics involved with MMT and NAFTA and its legality in the US despite not being used in the US).

You can read about top-tier gas at their Web site:

http://www.toptiergas.com/deposit_control.html


Warm engine and 3500 RPMs does seem like something a car would exceed fairly often unless it sat at the dealer for years with the engine idling:wink:.

Enjoy Life- you only get one!!

[Lburou]

We have two 05 SXT's totaling 60,000 miles between them and no problems yet....But, I've asked my wife to go past 3500 RPM on one shift during each drive she takes (after getting to operating temp of course).

We also use Techron fuel system cleaner, which is supposed to clean the carbon from the cylinder heads. I used this cleaner with my 93 LHS too. With the LHS and the LX I see an improvement in fuel economy as well as keeping the system clean. I use it whenever the fuel mileage goes down 10% from baseline (I keep records down to the knats behind to know when to clean the system). :)

I don't know how fnkychkn feels about this, but it works for me. My LHS still got 27.5 mpg on a 2600 mile trip with 136,000 miles just before I traded it. :)

[joshers22]

i have a 06 sxt for about 1 1/2 months. i took it in to get it decarbonized but a week later the light pops up again (same dtc codes: 0325 0300 0301). I'm actually worried that if i do this over 3-4 more times (and given i try atleast a different dealership) that it could result as a lemon. it only has 16,500 miles on it.

[fnkychkn]

i have a 06 sxt for about 1 1/2 months. i took it in to get it decarbonized but a week later the light pops up again (same dtc codes: 0325 0300 0301). I'm actually worried that if i do this over 3-4 more times (and given i try atleast a different dealership) that it could result as a lemon. it only has 16,500 miles on it.
decarbonizing alone is not enough. all exhaust valves must be manually rotated, all exhaust valve spring retainer locks must be replaced with new updated parts, the MAP sensor must be inspected and/or replaced and then it must be decarbonized. even then, some still exhibit these symptoms and the heads must be removed to re-seat the valves.

read all about it in this TSB (http://www.wkjeeps.com/misc/LX/TSB/TSB_0901006.pdf).

[Big RobsR/T]

I dont get any CELs on my car but every so often my engine will stutter while im at a stop light. It never does it unless its at idle. I guess around 600 rpm it will just drop and then come back up. This usually only happens when i have the A/C on though. Could this be the same problem? I have 48,000 miles on the car now. I drive it hard, there is no granny driving here.

[fnkychkn]

I dont get any CELs on my car but every so often my engine will stutter while im at a stop light. It never does it unless its at idle. I guess around 600 rpm it will just drop and then come back up. This usually only happens when i have the A/C on though. Could this be the same problem? I have 48,000 miles on the car now. I drive it hard, there is no granny driving here.
although it is possible, i would try an injector cleaning first.

[formerice]

This is not just a problem with the 3.5 Chrysler motors, Toyotas have had the same problem.

[Phil056]

i have a 06 sxt for about 1 1/2 months. i took it in to get it decarbonized but a week later the light pops up again (same dtc codes: 0325 0300 0301). I'm actually worried that if i do this over 3-4 more times (and given i try atleast a different dealership) that it could result as a lemon. it only has 16,500 miles on it.
I went through the same thing with my '05 two months ago. It was in the shop for multiple things for a total of 12 days. I had to bring it back to the dealer 3 times for the DTC 0304 code. TSB 09-010-06 mentioned in my thread link below is the one that they used. I'm not sure if you have an early 06 build but some need the MAP sensors replaced to the new types. Mine was replaced along with valve work. The code still came back after doing the de-carbonizing. They swapped the COP to another cylinder and drove for 35 miles. I'm sure they stomped on my engine to see if the codes came back. They didn't, but to be sure I put in a can of SeaFoam into my near empty tank and filled her up. I drove this tank pretty hard. Meaning, I took off hard, and kept the RPM's up around town (by staying in second for longer periods of time.) My car runs much better than before and I haven't gotten a code since. I will be putting in SeaFoam probably every three months to make sure it eats the carbon deposits and cleans the injectors.
Good luck and if you have any questions, don't hesitate to ask.
Phil
http://www.lxforums.com/board/showthread.php?t=56303

[SXTRED]

I had this same problem happen in November. I think they replaced the values, springs and clips like FNKY was talking about.

[lespaulguy]

Hi All,

I'm really a rookie at this stuff, but fnky, the first person's problem with the vibration sounds alot like the problem I have on mine. You suggested TSB 21-003-06 as a transmition problem.
Oddly enough my check engine light came on a few days ago also...so I brought it in to the dealer this morning. I'll give you guys an update as to the solution when I have more details.

Thanks!

[joshers22]

thanks for the tsb, yesterday the mil turned off, so i'll assume it'll come on again in a few days (it did before). i'll bring it up with the dealer.

[Jimsmag06]

I wish I would have had knowledge of this crap before I bought the 3.5L (crap design) engine. If I had I would have opted for the hemi!

Damn! Who puts engines in vehicles that have the same (incredible) problem for the past 5 years!

I'm pissed about this!
Who?
American Auto Makers who charge ungodly sums of money for their product, then don`t stand behind it......out of spec parts? weak springs? WTF...Thats why the Asian makes are so popular, Quality Control, and if you do have a problem, they treat you like Royalty when you take it in to have it repaired.

[MooNDoGGie]

Perhaps but they are still ugly :)

[bookeem]

i rather have an ugly car that works, then a nice car, u are payng for that sits in the dealers service dept most the time..

[ZMagnum]

No car is perfect. Imports have issues too. Years ago when Asian cars where first getting popular they did have better quality control than American built cars. This is no longer true but a lot of people still think it is so American car companies are strugglying while Toyota makes $14B in profit.

[boggart]

LX's are imports....:Na_Na_Na_Na:

[MooNDoGGie]

LX's are imports....:Na_Na_Na_Na:

If you actually think Canadian built cars are imports then your sadder than I actually thought. Have you ever heard of NAFTA??

Or you were just joking and I take this all back :wink:

[Jimsmag06]

Perhaps but they are still ugly :)
Yes, They Are!

[jcs11236]

is this TSB good for the 2.7 engine as well??

[boggart]

If you actually think Canadian built cars are imports then your sadder than I actually thought. Have you ever heard of NAFTA??

Or you were just joking and I take this all back :wink:

Just saw this again. Sorry, yes, joking. LOL But I am sad, because I traded the Magnum for a Jeep. I miss my Magnum, my kids miss the magnum, Opec is happy I have the Jeep.

[fnkychkn]

is this TSB good for the 2.7 engine as well??
this TSB is for 3.5L only.

[MagNite]

LX's are imports....:Na_Na_Na_Na:

So then all Sony products are Chinese as most of them are made in China?

Seriously though, you can't take everything an auto mechanic says as gospel. Like every other profession, there are good ones and bad ones.

[jeddy]

I just had the decarbonizing done...light cam e back on....then the egr valve replaced...light came back on...finally had the valve rotation TSB done...light is off now. I think I want to get rid of this thing before something else goes wrong...Problem is, these cars have NO resale value....

[Phil056]

I said the same exact thing when mine acted up. I had to take it back two times after getting the valves done. It hasn't come on in the three months since they last worked on it. Like I posted earlier, I will be putting in a can of SeaFoam most likely every oil change just to be safe. Might be overkill, but I don't want to visit the dealer for this issue again. I only have 13 months left of my lease, so I'm almost done anyway. good luck

[MooNDoGGie]

I've posted this before and I'll post it again here. If you want the 3.5L to run well you can't baby it. You need to/have to get into the high 6000's a couple of times a week to rotate those valves. Its a high output engine. Give it $hit once in a while!

[Phil056]

I've posted this before and I'll post it again here. If you want the 3.5L to run well you can't baby it. You need to/have to get into the high 6000's a couple of times a week to rotate those valves. Its a high output engine. Give it $hit once in a while!
That too! I have been doing that since I got it back and it does seem to work. That was my problem before, never really got on her, but now I do it a least once during each time I drive.