Tune-up parts are they OEM parts? P0300 is normally caused by vacuum leaks and bad gas.
Might want to check the airfilter and fuel filter conditions to complete your tune-up.
Loss of compression, and anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure.
Friday, September 28th, 2007 AT 2:22 AM