I have a 91 EX coupe auto. Just quit running one day. Cranks fine, and is def getting fuel. It IS NOT getting any spark at all. I tried pulling codes, and check engine light just stayed on solid. It has a PT3-A72 ECU with out the LED view. I bought a matching # ECU off ebay, and it does have the LED on the ECU???? I tried starting it late last night, no spark and battery pooped out before i could try and get a code. Will see what i get later, but any other suggestions??

 

Forgot to mention it has brand new wires, plugs, cap, rotor. All replaced after it quit running.

 

Are you getting power to the coil on the Black/yellow wire when cranking?
Have you checked for ignitor pulse when cranking?
Is the ground at the T-stat housing clean and tight?

 

The ground is good. I am charging the battery over night. Didnt have time today to mess with it. I can test black/yellow tomorrow. How do you check for ignitor pulse? Thanks

 

Ignitor most likely, I bet my kid on it.

 

What about the whole solid CEL when checking for codes? And what is up with 2 computers having same #'s 37820-PT3-A73 And one has LED window and one does not? I though solid CEL was bad ECU. I havent been able to check with new ECU yet.

 

Ok it no longer has a solid CEL, but still no spark. Checked grounds again and they are def good. There is constant power to black/yellow wire at distributor. It fluctuates when cranking but stays above 10 V.

How do you check for ignitor pulse?

Help me get this piece running.

 

Any other suggestions before I just replace whole distributor?

 

Test light on ground side of coil; when cranking it should pulse.
If no pulse replace ignitor.

 

I got it running. I took an ignitor from a junk f22a External coil motor, and borrowed a coil from a b18 distributor. Probably was igniter. thanks for the help hondadude. Hard to get replies if it is not about lambo doors, or JDM turn lights. lol