So I have 3 ECU's? and I do not know which one of these is used for a D15B2.

Car revs funny when it isnt engaged and shakes while in gear (timing?). clutch feels and acts normal, distributor looks new, I don't think I have a vacuum leak.

I have no idea even where the ECU is located. Help would be appreciated.

I have 2 of these gold ones and one fatter grey one.

 

Yes, those are ECUs. Assuming you have a 92-95 civic, the ecu is behind the passenger kick panel.

I think the proper ECU for that motor is the p06. I could be very wrong about that though. Look on the side of the ECU where the bar code is. There should be a bunch of numbers, a dash, "p06", another dash and the more numbers.

 

Sorry If I double posted I may have written another post about this and forgot about it. I only see blue numbers with periods in between

 

Forgot to mention, the engine is in a 91 civic.

 

nvm i see numbers - 37820-PM5-A80221-236362 and a date which those were periods

 

the other one is a P2P

 

p2p sounds like the smaller one used on an obd2 engine. unless you have converted everything to obd2 in the 91 civic you have, I would stay away from it. You could also run an obd0 to obd2 harness, too. I talk more about these harnesses below in this post.

My suggestion for you would be to research what ecu you need for the motor. I believe it is a p06, but i definitely could be wrong. Assuming p06 is what you need, that is an obd1 ecu, and although my knowledge about pre-92 civics is small, i think the 91 is considered an obd0.

If you want to run this setup, grab the correct ecu, and use a conversion harness like the one i linked below.

Conversion Jumper Wire Wiring Harness Replace OBD0 to OBD1 Harness Car Wiring | eBay

I would suggest taking a look at the ECU and the plugs you have to make sure they look the same as what the harness has.

 

So I did some research. The car is swapped of course with a B2. It uses PM5/P04 ecus. I still can't find where the ECU is lol.

 

Found the ECU after pulling up some carpet its behind a plate. Gonna do some work tomorrow and maybe install the "extra" labeled ECU

 

OK found my old post for revving issue so I'll post there. Could someone delete this post? I don't want to "double post"