96 GC problems pullin' my hair out!
I'm new to the forum, so please bear with me. I've got a 96 Grand Cherokee 4.0 that I just can't figure out. This isn't my first one, I've had GCs before now but this one has me stumped! I bought it for a song, running rough, stalling and a few other issues like the door locks working all by themselves going down the road and the alarm stopping the truck from running from time to time. Well, to make a long story shorter, I,ve bypassed the alarm system by taking all the panels off the doors and putting a wire between the harness contacts. Problem solved there. So far I have replaced every engine sensor, T.P.S., M.A.P. A.I.C, Both O2 sensors, got a reman P.C.M. checked for vacuum leaks, cleaned all grounds, all to no avail. The only thing I haven't replaced are the fuel pump and filter. Cat and muffler are new. This process of elimination is costing me dearly. One thing, after running at idle for a few minutes , shut it down, and take the cap off the fuel rail, press the valve and just a dribble comes out. Now I know These have to have 45 to 50 Lbs. to run. Should it retain pressure after shutdown? Have I just guessed my problem?