So ive been trying to hunt down this slight misfire im having on all cylinders for a little while now. Pretty much everything in the car has been changed.Plugs( al 606), wires, maf, icm, fuel filter a year ago, o2 sensors, no cat, no egr, lim.
So ive pretty much narrowed it down to the fuel pump. Last time i checked my pressure was a year ago when i got the car and i thought it was 62 psi with key on engine off. Well i just checked it and first cycle it was at 50 psi and started to drop slowly. Second time i tried it was at like 54-55 and same thing dropped slowly over ide say 10 second about 5-10 psi loss. I tried with car on and it read 62.
So i believe the pump is bad. Opinions?
Oh forgot to mention this morning the car hesitated to start. the first turn of key. Second time it started fine. And when i went out today a few hours later it started fine.