homebrew
NAXJA Forum User
- Location
- Bremerton, WA
My brother in law is looking for a replacement ECU. What would be his best resource to aquire one. Thanks
I bought a '98XJ that wound up having a bad ECU. Symptoms were no activity from the volt meter and fuel gauge with the key on, code P1694 was active (but the check engine light was NOT on), and the truck had no spark. I'm not sure if the fuel pump still worked since that also wound up being bad.
I did read that ECU's very rarely go bad, so I was confident in buying a used one on e-bay. I just matched the numbers from the one I pulled and got one for about $75 shipped. Popped it in and the truck fired right up (after I replaced the bad fuel pump, of course).
Ive also heard they rarely go bad. However, I'm still trying to diagnose my problem and after reading your post I'm thinking this may be the issue. I bought my jeep not running off a buddy. Had no fuel pressure so replaced the pump...new pump didnt kick on. My voltage meter and fuel gauge doesnt read, and I have no spark. I have tried connecting an OBD II but there was an error so it wouldnt connect. I think I'm going to look into finding an ecu now... Thanks for that post! :thumbup:
Ive also heard they rarely go bad. However, I'm still trying to diagnose my problem and after reading your post I'm thinking this may be the issue. I bought my jeep not running off a buddy. Had no fuel pressure so replaced the pump...new pump didnt kick on. My voltage meter and fuel gauge doesnt read, and I have no spark. I have tried connecting an OBD II but there was an error so it wouldnt connect. I think I'm going to look into finding an ecu now... Thanks for that post! :thumbup:
My voltage meter and fuel gauge doesnt read, and I have no spark. I have tried connecting an OBD II but there was an error so it wouldnt connect :thumbup:
Ive also heard they rarely go bad. However, I'm still trying to diagnose my problem and after reading your post I'm thinking this may be the issue. I bought my jeep not running off a buddy. Had no fuel pressure so replaced the pump...new pump didnt kick on. My voltage meter and fuel gauge doesnt read, and I have no spark. I have tried connecting an OBD II but there was an error so it wouldnt connect. I think I'm going to look into finding an ecu now... Thanks for that post! :thumbup:
The cps is brand new. i tried doing the whole unlpugging and plugging back in with the new and old one and it didnt make a difference. One of my buddies thought like 2 weeks ago it was the ecu, the other is thinking its a wire somewhere. We've checked wires like crazy and havent really found anything odd looking with the exception of one wire that I believe is light blue, that hangs down by the drivers side kick plate. I brainstormed a little bit and noticed that when the drivers door (only that door) is open, I dont get a buzz noise or the interior light does not come on like it should. So my guess is that what the wire was for...if I'm wrong please correct me! Ive also checked grounds in the engine bay and everything seems fine. the ones that seemed like they could be questionable I took off and cleaned up then put them back.
No security system joe.You need to pin out the harness with a
Any chance you have a security system with an ignition interrupt?