I just looked at another site and all the ecu stuff is good. When i have the ex pluged in it turns over, but when the Ls ecu is in it just cranks but doesnt start. Do you think that the Ls ecu is busted? I know i have to extend the O2 sensor but do you think I have to do any thing else on the motor side. I just checked the map sensor and stuff cause I know three sensors have the same plug but their all good. When its started with the ex it just revs to like 4,000 rpms. Sorry to bug you but you guys know more than anyone i know of, thanks again.

 

Well it doesnt start with the LS ecu... What have you checked? spark? fuel? whats not happening? obviously the engine will run, so compression and timing is ok. You need to figure out what what is not starting the engine with the ls ecu. I cant really diagnose a problem that I cannot see..

Jeff

 

Thank you very much for trying!

 

I am about 95% sure you're ecu is broken, I'm sure you know somebody with an LS, just swap ecu's for a minute, try their ecu in you're car to see if it will start along with trying your's in their car, that will at least give you some direction.

 

you have a 96 ex ECU, and an LS ecu, what year is the LS??

 

Hey whats up. Yesterday me and Pdog check my whole motor and we found a chunk missing from the intake manifold gasket. That explains all my idle probs. Thanks to everyone who tryed to help me.