Hi all. I use to have a 93 wrangler, and now I just picked up a 92 Cherokee 4.0l Auto with 156k miles. I've always used forums to solve my problems on my vehicles and i've searched for this problem and done most things people suggest and still no luck.
Heres my problem - The Jeep starts and immediately dies. If i give it throttle it still dies. Sometimes when I give it throttle it will rev quick before dieing. It only stays running for about 1 second and rarely stays running for up to 3 seconds. Here's what i have checked.
1.Crank position sensor (installed new one, no help, put old one back in)
2.Throttle Position Sensor (Installed new one, no help, old one back on)
3.IAC (removed and cleaned)
4.MAP Sensor (Unplugged to run on default mode)
5.Checked the 6 pin relay under passenger side dash
6.Checked the resistor on the drivers side fender by twisting the wires together to bypass the relay/resistor (whatever it is)
7.Checked fuel pressure. It reads 32psi with the key turned to the on position. when i start it, it quickly jumps to 42psi, then when the motor dies, it returns to 32psi.
8.I read somewhere the cat gets plugged so I split the exhaust before the cat but no help.
9.New Cap, rotor, plugs, wires.
10.Swapped Fuel Pump Ballast Resistor from running Jeep
11.Fuel pump relay, tried 2 others.
12. WILL STAY RUNNING ON STARTER FLUID
13. Brand new fuel pump
14. Fuel Regulator doesn't leak
Anyone else have any ideas? I'm pretty lost on this.