Hey guys we are looking at doing some ECU tuning for out 88 CRX. I was told its much better to find a 90-91 PM6 because it simply much easier to chip. Ok that's cool. BUT, how can you tell what year the ECU is out of? Dose anyone have a pic of a 90 or 91 I could compare to my 88?

Any help like always is greatly appreciated!!!

 

EDIT: skip this post and listen to janz3n

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dumped4dr &raquo;</TD></TR><TR><TD CLASS="quote">on the side of the ecu it will say which it is... PO6 or PM6</TD></TR></TABLE>

huh? po6? thats new..
the year is in the code.. either before or after the pm6 i forget. it will be like 88 or 90 and so on. think all pm6 ecus say pm6 and not po6. but i could be wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by janz3n &raquo;</TD></TR><TR><TD CLASS="quote">

huh? po6? thats new..
the year is in the code.. either before or after the pm6 i forget. it will be like 88 or 90 and so on. think all pm6 ecus say pm6 and not po6. but i could be wrong.</TD></TR></TABLE>

no i think i fucked up...
thanks for the correction

 

Ok I found one on ebay the #'s on the sticker are

37820-PM6-A09
620-309482

there is no 89 or 90 in that number so what year is it? and how can you tell?

 

there is a date stamp on the side of the ecu in blue ink

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rextec &raquo;</TD></TR><TR><TD CLASS="quote">there is a date stamp on the side of the ecu in blue ink</TD></TR></TABLE>

Bingo. Its not part of the serial code.

 

oops.. well i know mines stamped near the code

 

try this:

http://www.ef-honda.com/ben/PM6diff.php

 

Thats exactly what I needed to see thanx alot!!!!!

 

pm6-a09 is external eprom

 

I have one of the last CRXs made.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxnj &raquo;</TD></TR><TR><TD CLASS="quote">
pm6-a09 is external eprom</TD></TR></TABLE>

Correct...

So is

PM6-L09 (Cali)
PM6-C00 (Canada)

PS9 are all external eprom as well...

PR4-A01 (A02, L01, L02)
PR4-A10 (L10)

These are all external eprom

 

^ Listen to this man.

 

why is the 90-91 so much different from the 88-89? thats weird. i just replaced my 88 pm6 with a 91 pm6 with a "mugen" chip to make it a pm7, dont know how much i believe its mugen since it lookes like a sticker that was printed out at someones house. but my car is a 91 and my car seems to runt much better with this chipped ecu, a little rich. but the rpms dont fall so hard when i let off the gas and clutch. and the powerband is much smoother and a little more power at that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by janz3n &raquo;</TD></TR><TR><TD CLASS="quote">why is the 90-91 so much different from the 88-89? thats weird. i just replaced my 88 pm6 with a 91 pm6 with a "mugen" chip to make it a pm7, dont know how much i believe its mugen since it lookes like a sticker that was printed out at someones house. but my car is a 91 and my car seems to runt much better with this chipped ecu, a little rich. but the rpms dont fall so hard when i let off the gas and clutch. and the powerband is much smoother and a little more power at that.</TD></TR></TABLE>

It's probabaly one of those generic chips that ups the fuel and advances the timing a bit..

 

lol im sure it is. oh well. car runs better with it. havnt seen black smoke at all, only smell the fuel when im pushing it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">try this:

http://www.ef-honda.com/ben/PM6diff.php</TD></TR></TABLE>

After looking at the pics I bought a 91 CRX ECU off Ebay a 37820-PM6-A09 with the date stamped 90 8 21. I took off the top and the chip that is circled in the above link in soldered to the board. Is this still the ECU I need for tuning??

Sorry for bringing up an old thread but I just got the package today.

Thanx


Modified by vbspec at 12:55 AM 5/19/2007