Then just after startup when the engine is still warming up, the check engine light will come on again
Is it the same code reappearing? -If so check that cylinder's compresssion and injector.
Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Wednesday, June 18th, 2008 AT 7:45 PM