rough idle!!!!!!!!!!!!!

[cm2005300]

Im Having Some Rough Idle Issues And Already Had The Tsb Done And Its Still Doing It What Do You Think Would Help I Have Seen A Thread About Combustion Chamber Cleaner You Think That Would Work Also Im Only Getting About 12 Mpg With My 2.7 In The City Any Ideas On How To Improve That I Tried Fuel System Cleaner So Well See If That Works Also I Was Down A Quart So I Dont Know If That Would Of Made A Diffrence I Just Want My Car To Last Forever And I Want To Get Decent Gas Milege I Have The Smallest Engine So I Should Be Damn It!!! Hahaha Thanks Guys

[cm2005300]

anybody? its crazy that this is a known problem and no one has any idea as to whats going on

[bookeem]

step up to 89 octane, thats what i did and smoothed everything out, or was it coincidence...

[MagNite]

If you're only getting 12 mpg city, there is definately something wrong....

[cm2005300]

wht do you think it is and i will try to get 89 on my next fill up and see if that helps some say it wont some say it will so......