I'm driving a 1991 integra 5speed with a B16a motor swap how can i tell what computer i'm running by looking at it , also were is it located on my car any relpy would be helpful thanks .

 

It's on the passenger side floorboard under the glovebox,
should have label on it.

 

the number should be like this... 37820-XXX-XXX
the first three digits are the typical way to tell what it is, the second set of three tell more specific info about it. (USDM/JDM/EDM, trans type, etc)

 

thanks for the info i'll check it out right away.

 

ok i checked the sticker on my ecu says p30-000 is this the correct computer to run on an 91 integra with a b16a swap and if so what does the 000 mean i need to know if i'm running a us version or a jdm version of the b16a ecu. any reply would be helpful .

 

P30 = OBD1 B16 ECU
000 = JDM, manual trans and first version of the board inside. (not a bad thing)

The USDM version is the P30-A01 - very rare (two years 94-95)
the P30-A02 and P30-A03 are OBD2. (super rare, one year each 96 & 97)
they are from the DelSol VTEC.

 

thanks relic your info has been super helpful maybe you can anwser a couple more questions in the future anyway thank you .keep it honda.