I bought it, but I forget what it is; there are no stickers or markings on it anywhere. I know it's obd0 without an external rom. Actually on the side there's what looks like an ink stamp that says '91.4.25... so any ideas?

 

Actually.. I think that might be a PM5 or PM9 DPFI ECU..

From what I see of the picture, it's a USDM Civic ECU (based on the location of the CEL LED), and the second chip from the bottom, on the right, is _not_ an M38256AP EEPROM, like the PM6 and PS9 would have if that 91.4.25 stamp correctly matches the board.

There is normally a sticker on the A Plug socket, and a sticker right by where you read the stamp. Whomever sold this to you seems like they were trying to hide something if they removed both of them.

 

would it be possible to buy a daughterboard for this ecu to make it chippable?

 

Not if it's a PM5 or PM9.

They are dual point ECUs.

 

pm8 hf computer

 

I believe you can use a daughter board on a PM8.

 

I just looked through my old Ebay auctions; seller claims it was a PM8 HF computer, 88-91. I'll give the daughterboard a shot. Thanks guys. Anyone have that link to the thread on pgmfi where the guy is selling daughterboards?

 

http://pgmfi.org/phorum/read.php?f=12&i=2206&t=2206