ECU serial: 37820-P72-A04-970-309678


Want to buy this ECU this weekend, P72 is the right GSR obd2 ecu, and i believe the A04 means 4th generation, so 1997 correct? Anything else i can look at to make sure it's a 97 ecu? Help is appreciated.

 

A USDM '97 GSR ECU ended in A03, not A04. If you are putting the 98 ECU on a 97, you will receive CELs for the fuel tank pressure.

 

thanks for the info, i'm currently have a 96 gsr motor w/ a 96 gsr ecu, but my chassis is a 97 LS. So i wanted a 97 gsr ecu so i can smog w/o problems

 

i have one if you want to sit tight for a bit. i'm switching over to a 98 p73 ecu and am open to selling my p72. both of which are a03

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GR_DC2 &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the info, i'm currently have a 96 gsr motor w/ a 96 gsr ecu, but my chassis is a 97 LS. So i wanted a 97 gsr ecu so i can smog w/o problems</TD></TR></TABLE>

Correct me if im wrong, but 96 and 97 GSR ECU's are the same, no need to switch

 

i thought they were too. also thought a04 was the 2000-2001, i'm not 100% on any of this stuff but i thought 96-99 were compatible ecu's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">i thought they were too. also thought a04 was the 2000-2001, i'm not 100% on any of this stuff but i thought 96-99 were compatible ecu's</TD></TR></TABLE>

96-97 were the same, 98 had a fuel tank presure sensor that sets of the CEL in 96-97... Im not sure if 98-99 ecu's are the same though...

 

I currently have a chipped A02 in my '97. (Yes, you can chip an OBDII ECU.) It passed the OBDII diagnostic smog without issue.

The point is that 96 and 97 ECUs are interchangeable.

 

yeah i understand that 96 and 97 ecus are interchangeable, which is why i'm looking for a 97 ecu.

What i heard is that when the smog tech hooks up to my car, the ecu will display 1996, when my car is a 1997 LS. Thus the tech has the right to fail me, since here in CA, it's technically illegal to have an older year motor in your car. Has to be same year or newer.

So this is why i'm looking for a 97 ecu, and wondering if there is anyway i can check the serial to know for sure what year it came out of. If i just pick any random A03, i may get another 96 ecu and that won't do me any good!

Thanks for the help guys, really appreciate it.

 

can anything be done with the tank pressure CEL when using a 98 ecu in a 97? either hooking up the pressure switch or bypassing?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">i have one if you want to sit tight for a bit. i'm switching over to a 98 p73 ecu and am open to selling my p72. both of which are a03</TD></TR></TABLE>

cool, i'll keep in touch! let me know when you are read to sell

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">A USDM '97 GSR ECU ended in A03, not A04. If you are putting the 98 ECU on a 97, you will receive CELs for the fuel tank pressure.</TD></TR></TABLE>


ohhh is it A03 b/c its 3rd gen? let me know if i have this right: 1st: B17 GSR, 2nd: obd1 GSR 94-95, 3rd: 96-99 obd2a gsr and 4th: 00-01 obd2b

I kept thinking i needed an a04 b/c 97 is the 4th year of the dc2. thanks for the clarification.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GR_DC2 &raquo;</TD></TR><TR><TD CLASS="quote">


ohhh is it A03 b/c its 3rd gen? let me know if i have this right: 1st: B17 GSR, 2nd: obd1 GSR 94-95, 3rd: 96-99 obd2a gsr and 4th: 00-01 obd2b

I kept thinking i needed an a04 b/c 97 is the 4th year of the dc2. thanks for the clarification.</TD></TR></TABLE>

No, thats wrong... B17 was a p61? 94-95 wasP72-A00 or A01, 96-97 A02 or A03, 98 A04, 99-01 was OBD-2b, which won't work in a OBD-2a car...

You will be fine with your ecu, I passed Cali smog with my A02 in my 97 Integra...

 

you should be fine from what i can find with your 96. i know my p72 is a 1997 unit because it's the factory one in my GSR. i just have to get this p73 going after my build. trying to find out if i'm going to have any werid CEL stuff like the above mentioned. if you want it i should be ready to sell in 3 weeks or so.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GR_DC2 &raquo;</TD></TR><TR><TD CLASS="quote">


ohhh is it A03 b/c its 3rd gen? let me know if i have this right: 1st: B17 GSR, 2nd: obd1 GSR 94-95, 3rd: 96-99 obd2a gsr and 4th: 00-01 obd2b

I kept thinking i needed an a04 b/c 97 is the 4th year of the dc2. thanks for the clarification.</TD></TR></TABLE>

37820-P72-A01 94-95 GSR OBDI
37820-P72-A02 96 GSR OBDIIa
37820-P72-A03 97 GSR OBDIIa
37820-P72-A04 98-99 GSR OBDIIa, fuel tank sensor
37820-P72-A05 00-01 GSR OBDIIb, immobilizer

 

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

37820-P72-A01 94-95 GSR OBDI
37820-P72-A02 96 GSR OBDIIa
37820-P72-A03 97 GSR OBDIIa
37820-P72-A04 98-99 GSR OBDIIa, fuel tank sensor
37820-P72-A05 00-01 GSR OBDIIb, immobilizer

</TD></TR></TABLE>


Thanks!

Glad i didn't buy the ecu then!!! would have bought the wrong gen.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dc4iNtEgRa &raquo;</TD></TR><TR><TD CLASS="quote">
You will be fine with your ecu, I passed Cali smog with my A02 in my 97 Integra...</TD></TR></TABLE>

Good to know, but might have that been b/c the smog tech was lenient? I hope i get lucky!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">you should be fine from what i can find with your 96. i know my p72 is a 1997 unit because it's the factory one in my GSR. i just have to get this p73 going after my build. trying to find out if i'm going to have any werid CEL stuff like the above mentioned. if you want it i should be ready to sell in 3 weeks or so.</TD></TR></TABLE>

Cool, i may just pick it up for piece of mind. how much do you want for it?

 

^^^ Use IM or email. This is not the marketplace.

 

send an email to c5in2004@aol.com and we'll chat.

as to the a03, a04 etc..i was also under the impression, as dog has stated that it was the a04 and a05 that created issues. a02 and a03 were good to go. however, when i found http://www.ecmtogo.com/acuraecmecupcm.htm

they list 37820-p73-a03 as a 1998 type r ecu. a04 was 1999. i'm almost wondering if they were crossover parts because a02 and a03 are 1997 p72 codes. is it possible a03 p73 is early 1998? did that fuel sensor become a mid year thing?

 

The A02, A03, etc. were specific to the P72 ECU. You have to use the full part number, i.e. 37820-P72-A03. Those designations differ for P73 ECUs. For instance, the 1997 USDM ITR ECU is P/N 37820-P73-A02.

 

that's what i was wondering. so does the 37820-p73-a03 have that fuel sensor issue?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">that's what i was wondering. so does the 37820-p73-a03 have that fuel sensor issue? </TD></TR></TABLE>

Yes it will. Here is the fuel tank parts list for the 1998 ITR. Notice part 1 is a pressure sensor.

http://www.acuraoemparts.com/d...ch=no

 

ack. last question before i look into figuring this out. in some cars a CEL will retard timiing, is this the case with the integra or is it just something i will have to fix for emissions?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idrivesideways &raquo;</TD></TR><TR><TD CLASS="quote">ack. last question before i look into figuring this out. in some cars a CEL will retard timiing, is this the case with the integra or is it just something i will have to fix for emissions?</TD></TR></TABLE>

It depends on the CEL. Some will prevent VTEC from working. I doubt that a loose gas cap would cause either of these issues. Get a helm manual and look into the expected input from that pressure sensor. You may be able to add a jumper to eliminate the issue.