After an engine swap, drove it for a few days, then I got a CEL for the TPS sensor. I changed it at O'Reillys and then it wouldn't start. Tow it home, buy the OEM TPS, now still no start, the code is now P0340. I have changed the crank sensor, it is not OEM but I did test it, it has 5 volts and ground and it "clips" when hand cranked. So I checked and it appears I do not have spark. I checked the coil and it is working. I have brand new cap rotor wires and plugs, all OEM. The distributor is original. But was functional. Getting super frustrated . Don't know why changing the TPS would throw off timing? ECU? Thank you for you time.

 

P0340 is the camshaft sensor. Did you break it changing the rotor and cap?

 

Did you pay $16,000 for a '97 Cherokee? Man I hope it's one clean ole gal.

 

paid 500 for her. new engine, rims, tires, bumpers, winch, new lights, new seats, new windshield, intake, 4 core new radiator, new fuel pump, OEM sensors, I think all of them, tps, map, idac, crank, plus new steering box, alt, all new hoses...
plus little stuff like console latch, 12's,

 

No, I'm sure the plate is fine, I changed it after to be sure.
Im stumped.

 

Did you try putting the old TPS back in? I recently just bought a TPS from Napa and it was DOA. Took me way longer than i'd like to admit to figure that one out.

Also, did you really pay 16k for a Cherokee?

 

I did try the old one and a third one from a dealer, OEM.
No, that's how much I've dropped on it. Be nice if I could drive it.

 

the wiring harness to the dizzy near the connectors is notorious for failing, bad wires etc, if it is ok , and you have cleared the code and it continues to return,
I would either perform the tests outlined in the Service Manual, Youtube, or just replace the cam sensor

 

well she does look great.

 

How is the coil?

 

I had put an after market one in, and swapped the old one to try them both, nada, ran tests on both and both seem operational. Something is telling it not to spark.

 

Thank you. Just need to get her going, almost ready to pay someone to figure it out but funds are running low after all the parts.. lol Jeep problems.

 

First, I am not an expert...just trying to help...

I think the ecu has to match the engine if I remember reading that correctly.

Resetting the ECU it learns for the first 50 starts.

Is it possible that the ecu threw a code because it didn't know what else to do as it was receiving conflicting data and then shut down?

I don't know, just know what I have been through with my Jeepster...

 

Hmmm... That makes sense. Signs are pointing to the ECU, I think I replaced TOO many parts, now I am second guessing anything that isnt OEM, The only thing left not OEM is the crank sensor, (Standard) brand, and the distributor itself, the cap rotor etc are OEM, but not sure where the ebay dizzy came from. I did try to put back in the old one, no luck. Me thinkin ECU

 

What does that mean?