I just helped my buddy put a D15z6 in a 96 civic ex. It ran but had a check engine light. A tech scanned the computer, and thinks the ECU could be bad. Do you think it is a bad idea to let him borrow my 96 civic ex's ECU to test that theory?

 

Yes, if there is a short in his system, it can take out your ECU also, better to put his ECU into your car to test it.94

 

Is the ecu OBD 1 or 2 that u are using. Try opening the ecu and smell it to see if uts burnt or may have humidity corosion.

 

That is a good idea. Thanks

 

both obd2

 

Then if it the tech couldnt read the ECU the i think most likely is toast. BTW dont try his in your car.

 

I add if the ECU is JDM than it will not read it either.

 

If the backup fuse (usually in the underhood fuse panel) is blown, the scanner wont connect either.