BlacknBlue_XJ
NAXJA Forum User
- Location
- Longmont, CO
There are a ton of factors in play, so I'll do my best to explain everything clearly and concisely.
The Jeep is a 2001 XJ.
Symptoms:
Replaced crank sensor with no change. Engine grounds are good. I started to poke around and discovered one of the wires to the fuel pump got pinched and grounded, but not for that long. Thought that would fix it, but no change after repairing the wire. I didn't check the relay, but I did jump the pins in the PDC and it struggled to start as before. I'll check/replace the relay tomorrow.
I guess I'm looking for someone who has chased electrical gremlins through this system before and could give me some ideas. If the new relay doesn't do it, I'm thinking the fuel pump may have taken damage from the short, or (hopefully not) the ECU got fried. Cam sensor? Pulling my hair out on this one - thanks in advance!:cheers:
The Jeep is a 2001 XJ.
Symptoms:
- The symptom started as what you would expect from a heat-soaked injector; a rough idle for a couple seconds after a start and then it would run/drive fine.
- The starts got harder (cranked for longer before firing, idled poorly for longer).
- Tried to pull the CEL and two parts shops couldn't get their scanners to connect.
- No Bus on the cluster.
- Relays in the PDC click and buzz constantly with key on; removing ASD relay or fuse #11 in the kick panel stops clicking
- Car died on the side of the road in typical crank sensor fashion.
Replaced crank sensor with no change. Engine grounds are good. I started to poke around and discovered one of the wires to the fuel pump got pinched and grounded, but not for that long. Thought that would fix it, but no change after repairing the wire. I didn't check the relay, but I did jump the pins in the PDC and it struggled to start as before. I'll check/replace the relay tomorrow.
I guess I'm looking for someone who has chased electrical gremlins through this system before and could give me some ideas. If the new relay doesn't do it, I'm thinking the fuel pump may have taken damage from the short, or (hopefully not) the ECU got fried. Cam sensor? Pulling my hair out on this one - thanks in advance!:cheers: