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1995 XJ won't stay running

jd350az

NAXJA Forum User
Location
Mt. Lemmon, AZ
Sorry I've been trying to search forums and the net but not finding any good info. I had a bad fuel pump. Or so I thought. Well, it was bad but that's not the entire issue. I replaced the fuel pump and it still wouldn't fire up. 1995 XJ, 4.0, auto. I had tested the relay and it was clicking and sending power but I realized it was cutting power after it started. I could jump the relay and it will run fine. So I was reading that the PCM sends that signal and if it doesn't sense cps after 5 seconds or something it cuts power. So I tested cps but it has infinite resistance and is not killing gauges and cel so it seems to be ok? Could it be PCM or is there something else to check?

But I pulled the dash off and found a bunch of unplugged connectors. I need a schematic lol.

https://imgur.com/a/veHTV00

anyone know where or what these were supposed to be plugged into?

https://i.imgur.com/Bd23IdT.jpg
This thing is super hot?
 
The 2-pin connector could be for dash speakers. They're not connected if you don't have them. If crank sensor stops working, the engine dies like you turned off the switch versus sputtering out like you ran out of gas. The crank sensor will often not set a CEL. But you said it'll keeping running if you jumper the fuel pump relay so it's not the crank sensor. ASD relay possibly?
 
I have used this a ton. My first XJ is an 86 that has a 93 YJ motor/drivetrain that the previous owner had done a poor job integrating. I was able to really clean things up with these wiring diagrams. http://jeep-manual.ru/index.php?page=334
You can take the ASD relay out of the picture. There are write ups all over about it.
 
Just because it was sold in 1995. and called a 1995. doesn't mean it doesn't have one.
Cos mopar...
Still should check
 
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