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Discussion Starter · #1 ·
I have a 1990 CRX with a '92-95 motor.

What ECU do I have and what should I have.

The car seems to run fine and gets good mpg so I belive it has the correct ECU but I would like to know what it has.

TIA

Bob
 

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There is normaly a white sticker/tag on the bottom side of the ECU.

OBD0-
PM6 ECU


OBD1 (probably what you have)
P28 ECU


The three letter numbers centered off by 2 dashes "-"p28"-"

Hope this helps...

And if you dont know where the ecu is its under the carpet in the passenger floor board.
 

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Discussion Starter · #3 ·
Thanks, this is just what I was looking for.

Is the p28 what came with the car or was is changed when the engine was swapped?

Bob
 

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With the B7 you don't need a P28, if that's what you have. You could probably sell it for some cash since it's desirable and get the correct ECU for the engine (I would definitely be willing to trade you!).
 

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If its the B7 you probably have a PO5..Give a look and let us know.
 

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It's probably safe to say that the stock D series was pulled and the D15B7 was thrown in it's place, keeping it OBD0. You more then likely are running the PM6 ecu. Nothing wrong with that for a SOHC non-vtec.
 
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