WTB: 90-91 Civic Si OBD-0 5spd PM6 ecu. Must be in 100% working condition, and out of a 90-91 Civic Si!!!

The last PM6 I bought came out of a '90 EX and wouldn't communicate with the alternator in my Si(when the ELD tells the ECU to tell the alternator to put our more power), either the ECU is bad only in this small way or I can't use the EX PM6 so please make sure the one you're selling came out of a 90-91 Civic Si.

PM me with your price, shipped to 65706. I pay via verified/premier paypal.

 

Pm sent!

 

I had an ELD issue on my 90 crx hf with a dohc zc, Have you tried replacing your ELD? Sometimes they go bad, I swapped out my fuse box, fixed the issue

 

Swapped the fusebox twice, alternator three times, battery twice, checked all the wiring, etc. My '90 Civic Si had the voltage problem, my '90 Civic DX did not. After I MPFI + Si converted the DX, it had the votlage problem...and I was using the DX engine harness and DX fuse box. This means it's my Si ecu.

 

engine fuse box is bad but i do have a pm6 ecu lmk.

 

Definitely not the fuse-box. This '90 DX did not have the voltage problem until I did the MPFI conversion and swapped over all my Si gear from my '90 Si that did have the voltage problem. Because I kept my DX fuse-box and engine harness, this means it is either my Si alternator or ECU...and I am 100% sure it's not the alternator. If the ELD was bad, the ECU would throw an ELD code. Also ran the necessary tests on all the ELDs I have here, all pass. Definitely the ECU.

PM me a price shipped to 65706, and what year/model is the ECU out of?

 

88-89 crx civic si

 

50$ shipped.. my paypal is nihad_masic @ yahoo. co m

 

Those PM6's ecu have the same part #. How would you know which is the si ecu?

 

All I know is my PM6 which is out of a '90 EX is not communicating with the alternator after the ELD tells it that the system needs more voltage when stuff is turned on. It could be bad in that small way, or incompatible somehow with my Si gear. I figured my best bet was to just make sure the next replacement is from an Si.

 

change you **** engine bay fuse box and you will be golden or maybe you have a bad ground.. Check your t stat ground.. Yeh buy my ecu..

 

It's not the fusebox, this DX with the OEM gear didn't have the problem. Now that the Si drivetrain and ECU is in the DX, the voltage problem that the Si had is back. I'm using the DX harness and DX fusebox, which are both proven to not be the problem.

This means it HAS to be the Si ECU, or the Si alternator. I replaced that alternator three times in the Si, the third one was brand-new/not a refurb. I've ran test after test on the alternators, all the ELDs, checked all the wiring, etc.

It is definitely the ECU.

 

Well I have a Ecu from a 91.. make offer.

 

Dude i have pulled the complete wiring harness from my 89 civic si just to get this eld system fixed... GL

 

check the pins for the fuse box make sure none are bent and are fully pluged in..

 

Dude, you're not understanding what I'm saying. The DX did not have a voltage problem, the Si did.

The Si drivetrain and ECU are now in the DX, I am still using the DX fusebox and engine harness. This 100% without-a-doubt proves the Si ECU or Si alternator are the problem.

After replacing and testing the alternator so many times when everything was in the Si, I know it's not the alternator. It is the ECU. It receives a signal from the ELD because there's no CEL for the ELD, the problem is that it's not responding to that signal by cranking the output of the alternator when the ELD tells it to.

 

pm'd

 

I have one. PM me an offer. It came out of my 90 civic hatch si.
Alan

 

i have one out of my ef si i went bseries 50 shipped