eh2

I have a 97 obd2 GSR motor in my 95 hatch; I ran the motor with JDM and USDM obd2 p72 ECU without getting any check engine light. I get code 54, CKF sensor, and 65, secondary 02 sensor, as a result of using the USDM OBD2 ECU, but when I do have the sensor hooked up the codes goes away.

I want to use an USDM OBD1 p72 ECU for smog purpose, but I'm getting code 23, the problems could be knock sensor/ECU/open wire circuit.

I have read on here from other posts saying, "Blah blah blach...most of the time the problem is the knock sensor". Common sense dictate that the USDM OBD1 p72 ECU is messed up. What are you guys/gals opinion on my situation?

eh2

anyone?

eh2

https://honda-tech.com/zerothread?id=1853426

From this post I don't think the obd1 p72 ecu is tossed. Any opinion people?

turbociviccoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eh2 &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1853426

From this post I don't think the obd1 p72 ecu is tossed. Any opinion people?</TD></TR></TABLE>

where are you located? i say if it throws a code with the obd1 and not the obd2 then its most likely is the ecu. can you borrow a friends ecu and try it real quick? i think i can get one for you to try if your in my area...let me know.

eh2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociviccoupe &raquo;</TD></TR><TR><TD CLASS="quote">where are you located? i say if it throws a code with the obd1 and not the obd2 then its most likely is the ecu. can you borrow a friends ecu and try it real quick? i think i can get one for you to try if your in my area...let me know.</TD></TR></TABLE>

I would think the problem is the obd1 ecu but the car starts and i don't get a solid cel. I quite confused.

turbociviccoupe

only if you was closer. sorry i couldnt help bro. is the ecu tampered with by any chance? did someone (try to atleast) chip it?

eh2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociviccoupe &raquo;</TD></TR><TR><TD CLASS="quote">only if you was closer. sorry i couldnt help bro. is the ecu tampered with by any chance? did someone (try to atleast) chip it?</TD></TR></TABLE>

I got the ecu from a junkyard. The guy said it came from a 94 gsr; not too sure if it's chipped but most likely not tho. How can I tell if the ecu is chipped?

turbociviccoupe

open the ecu up and you'll see a chip if its chipped...lol. i have gotten ecu's before and the car starts fine but throws outrageous codes...but when i open it up i find out its messed up. one time its like they spilled soda on it or some thing(still sticky lol). and another time there was a burn mark like it fried.

eh2

what do you think?

[IMG][/IMG]

turbociviccoupe

no for the win!now open the bottom and look for any burns or anything.as well as the top. dont toss the ecu its probably still good for chipping!

eh2

here is the bottom side. I don't think i'll chip this ecu. i need to get my car to pass ref smog with this ecu but i'm getting the stupid code 23 aka knock sensor. well, do you have any idea what is going on with my situation?

[IMG][/IMG]

turbociviccoupe

you have to look bro i cant see small burns lol. you'll see it. it looks different. also check the knock sensor board. on the p72 the extra board on top is what communicates with the knock sensor. check for any burns on that also but sometimes ecu's just go bad lol. hey maybe its not the ecu. my best bet it to try a friends ecu. hoped i help you out somehow.

eh2

thanks for the effort tho.

anyone from s. cali what to rent me their unchip obd1 usdm p72 for like 2 minutes. I'll pay you 5 bucks or i'll by you breakfast.