"blue smoke" should I worry? help wanted!!

[wyd]

I have a basically stock 07 3.5ltr Charger; i've only added a CAI and BB duals.

Yesterday I passed a couple of friends of mine who were jogging along hootin for a burnout and while I don't do burnouts I obliged them with foot to floor demonstration from about 15mph. They said that the car was acelerating smoothly and progressively getting louder when all of a sudden it spewed some smoke and got really loud. I notice a change in acceleration at around 4k rpm's or so and I assumed it was somoe sort of timing change or something? Is this normal? What is that spike at or around the 4k rpm range? What's up with the smoke?


Please and Thanks!!
Sean

[jhs914]

Blue smoke is caused by excessive oil being burned in the combustion chamber. My guess is that you had an accumulation of oil in the throttle body/plenum area caused by EGR gases condensing in that area. That is why a lot of Hemi owners are installing catch cans. The oil vapors condense in the catch can instead of the intake plenum. You might pull the spark plugs to look for signs of oil fouling. With the engine turned off, take the intake tube off of the throttle body, open the throttle body manually and shine a light in the plenum area to look for accumulated oil. You might also notice that the back of the butterfly valve for the throttle body is black. That is from the EGR oil vapors. You can run a can of Seafoam or Mopar throttle body cleaner through it to clean it out. Otherwise, I wouldn't be concerned about it.

[wyd]

Thanks Doc!

[wyd]

can anyone help me understand the acceleration change? Is it variable timing or some sort of change in something???

[MikeEast]

I haven't driven an SXT since late 04, when I was bugging the dealer to deliver my RT, but I do remember a significant increase in power as the rpm's climbed hard.

I remember thinking "DAYUM! This thing pulls freaking HARD! and they put a freaking HEMI in these things too? DAYUM!"

Mike