misfire codes on 3 cylinders. have been driving for awhile with these codes and haven't really had much trouble until today. Had to replace an emission sensor that had gone out that was hooked up to vacuum hose because it started to sound like i had a huge manifold leak or something. Once these were replaced it fixed the leak sound but now when I put into drive it runs somewhat rough until I get to a certain speed and then it runs better. Will be replacing spark plugs in a few days and need to know if this should correct problem. when starting from stop it appears that rpms run high (2500-3000) before it levels out. (trans replaced 2 months ago)
Aug 4, 2009 at 3:22 PM