What are the symptoms for a bad fuel pump or ignition relay?
I was getting on the freeway this morning and my 1991 4.0L Cherokee started popping(back firing) and quit. It cranks and cranks but wont fire up. I got it towed back to my driveway with AAA coverage.
I have recently changed my TPS, CPS, Plugs, Plug wires, Cap and Rotor and my O2 sensor in an attempt to resolve a bogging condition while under load.
I have also installed a new battery, battery cables and cleaned all the grounds (On the side of the block, near the battery and near the ECU).
I also added fuel treatment in case it was a case of bad gas.
Prior to this morning my fuel presure read 20psi at idle and just under 40psi when accellerating.
I think the only sensors left are camshaft position, MAT, MAP and water temp.
After it quit, while cranking the motor this morning I noticed the oil pressure guage wasn't resistering
, which is a new symptom. I also turned the key on/off a few times and noticed a few codes (76? and xx?) I'll post those when I get home from work.
We have a trip planned this weekend, so I hope I can get it fixed in the next couple of days!
I've searched the ***t out of this one, so please respond accordingly.