Eagle_SX4 Posted May 24, 2023 Posted May 24, 2023 I am working on putting the fuel injection back on my '92 4.0 I have in my AMC Eagle SX4. The last 4 years I have been running it with the 4.2 liter manifold and carb set up. It is now finally time to put the original fuel injection back on it. I am having problems locating a good wiring schematic. I have the Haynes manual which has the computer wire schematic but I doesn't have the firewall bulkhead connector diagram or the power distribution center diagrams. I was wondering if anyone had either of those diagrams?
Eagle_SX4 Posted May 24, 2023 Author Posted May 24, 2023 Awesome thanks @acfortier. That is what I was looking for. This will make things a lot easier when I start slimming down the harness.
acfortier Posted May 24, 2023 Posted May 24, 2023 Just now, Eagle_SX4 said: Awesome thanks @acfortier. That is what I was looking for. This will make things a lot easier when I start slimming down the harness. NP. If it's hard to read, shoot me a message and I can get you a higher res. image.
Eagle_SX4 Posted May 27, 2023 Author Posted May 27, 2023 So it turns out jeep changed some things between 91 and 92 on the power distribution center. Here is a picture of the layout for both. It might be hard to read but they moved the relays around and added a fuse to the fuel injection. Still trying to sort it all out. If anyone has a 92 power distribution center schematic it would help a bunch.
Eagle_SX4 Posted May 28, 2023 Author Posted May 28, 2023 Thanks @1987Comanche that layout for the power distribution center is what I was looking for. Is there a more detailed diagram showing wire color?
Eagle_SX4 Posted June 10, 2023 Author Posted June 10, 2023 Thanks for all the diagrams it helped me to get all the wiring finished today. I got the engine to fire up but it won't stay running. I think it is a bad IAC valve. It runs for about 5 seconds with it unplugged and only about 1 second with it plugged in. The IAC and throttle body are clean I disassembled the entire throttle body and soaked all non electrical parts is my parts cleaner. Any tips on how to test the IAC Valve? I also think the TPS isn't working properly. I tested the TPS at closed throttle it is about .78 volts and at full throttle is only 3.5 volts. I have read that it is supposed to be 1 volt at closed and 4.5 at wide open. It's too bad you can't adjust it like a Renix TPS. I took it off and turned it with a screw driver and was able to get the 4.5 volts it is supposed to have but it won't do it at full throttle.
Eagle_SX4 Posted June 10, 2023 Author Posted June 10, 2023 Just kidding it was the computer I swapped in the spare I had and it now runs!!!
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