i swapped a obd0 ls(it was running in my std with a different harness) into my 90 civic ex, used a hf engine harness that i pulled from a junkyard. it turns over but i have codes 10(IAT) 15(ignition output signal) 6(ECT) 9(cylinder 1 position). sometimes the plugs spark once and then dont spark at all, two of them were sparking well for a little bit, but now none of them are sparking. i am able to try a different ecu, but trying a different dizzy is more difficult i dont know anyone with a ls.

i was wondering what you guys think? could the engine harness be bad or do you think i need a new dizzy?

i would really like to get this running for a meet this weekend

 

make sure your grounds are hooked up? was the care dpfi?

 

we put like 5 grounds on to make sure, and the car is mpfi

 

there can be problem with your engine harness.install any good performnce chip in it.

 

sounds like the distributor to me for sure