jokomoto Posted February 7, 2008 Report Share Posted February 7, 2008 Strange combination. I swapped out plugs, (went with coppers), checked my coil packs, and am stumped. The lumpy-ness seems to lessen as the car warms up, but is still there. Really bad when cold. No codes. My MPG is also not good, 14mpg. I live in hilly Seattle, but I think this problem is causing my poor MPG. It feels mechanical. Could it be something like a burnt valve, a PCV problem, exhaust manifold leak? Any Ideas? Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted February 8, 2008 Report Share Posted February 8, 2008 check engine light on?What brand of plugs? Link to comment Share on other sites More sharing options...
Pauloil Posted February 8, 2008 Report Share Posted February 8, 2008 how many miles?I had bad mileage once due to a frozen caliper RR brakeafter a drive, feel the calipers or use temp sensor to see if one is hotone rotor could be more worn out also Link to comment Share on other sites More sharing options...
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