Hey guys, I post this here as I feel more people that have messed with chipping the stock ecu's and such might know the answer...

I've experienced this situation before, but it was always with a 'bad' ecu, or one that someone botched a chip install..

Anyways, turn the key on, CEL comes on, relay primes pump, relay clicks off, but CEL never goes off. With a code it will come on, go off for a second or two, and come back on. This one just stays constant.

I've tried 2 different ecu's and it gives the same reaction. Has all power/ground inputs(checked with DMM).

Any ideas?

 

this is happening with a stock ecu? if not, it's an ecu problem like you answered it in your post.

 

It's happening with 2 stock ecus! I still want to say its an ecu problem, I'm goingn to plug them into another car this evening and see if they act the same or not.

 

Just to make sure are you getting a check engine light or a service engine soon light?

Check engine light will well like a engine. That means something is wrong

If it is a service engine soon light. That is just a reminder to change your oil and get a service done to the car.

Just want to make sure cause I get a bunch of people asking me about that all the time.

 

It's the check engine, the car will not start either, smells like its dumping fuel and when I checked last nite there was no spark. I checked through the dizzy and swapped the ignitor, coil ohm'd ok...

 

Unplugged everything that connects to the engine and turned the key on, same thing

This is a wierd one! I've probably done at minimum 200 honda swaps when we had our shop back in the day, and I've never experienced this...

 

hmmmm... what year's the car? fuel pump primes?

 

92 cx hatch. Guy supposedly drove it in his garage, put a 97 ex motor in it, and then it wouldn't start. I bought it figuring he fubared the dizzy wiring, but that all seems correct.

The initial key on seems right, light comes on, fuel pump primes for 2 seconds, cuts off. Only thing is the light doesn't go off, it stays on solid, like it has a bad ecu. Didn't get a chance to confirm ecu tonite, will try tomorrow or something.

 

Have you tried to read any diagnostic trouble codes that might be stored on the ECU? Self diagnosis procedure/paper clip method should still work if all of the ECU wiring is correct. It may or may not point you in the right direction.

 

I found a Honda troubleshooting flowchart on this issue. Seems it's possible to have an issue with the grn/wht wire for the tps/map/egr and it cause this.

Going to run throught that tonite and see what I come up with.