Mystery 0f the 2002 GT continued.
OK,guys...Gimme some thoughts and input..Got a 2002 Mustang GT 5spd. MIL light came on about 4 years ago after I had some tranny work done...No effect on performance occured.Codes indicated rear O2 sensors,so I replaced them,MIL light remained on,still no effect on performance..Fast forward a year,Engine burnt up due to overheating( stupid desperate move,nuff said). Had engine replaced with a 2004 engine,with 32,000 miles on it.. MIL light still on,same codes,replaced o2 sensors again,no change...Car runs strong,no loss of power,never would guess engine was swapped.Janurary this year,it begans to have a slight miss at cruising speed..Summer this year,It starts to run hot,but I do the right thing and pull over immediately as soon as temp gauge starts climbing past normal operating temp.Bad thermostat,swapped it,back to running(still misses at cruising).Couple of months,later-Slight miss turns into noticeable miss,Mil starts flashing periodically.within a month it jus bogs past half throttle,doesnt like to rev over 4000rpm,wreakes of raw gas when you put the pedal down... Had alternator serviced for bad diodes,extensive data logging(indicated same o2 codes,plus miss on number 7,cam sensor code). Find out intake had delaminated around rear water jacket,and a blown head gasket right at number 7..... New Intake,Head gasket repaired,COP replaced,spark plugs replaced,MAF checked and cleaned,and to NO AVAIL! Same symptoms,add the fact-Vaacum hose will blow off exhaust tube on back on engine if you stomp it.Also,If you stomp it,when it returns to idle,it is idling insanely rough( flop,flop,flop)*best I can describe it*..tap the gas and smooth idle returns... JJEEEZZ,HELP!!!