Its a 90 CRX si with a b16a and it gets different codes almost everyday. right now its getting the 22 Vtec oil presure switch 23 knock sensor and 15 ignition output signal. It starts and runs fine, vtec doesnt work.
The red stuff came out on the ECU so it means someone fucked with it. the knock sensor seems to be hooked up. the knock sensor was replaced and vtec worked for like 20 minutes and the knock sensor code was gone for a couple days. now its back to codes. any ides????????

 

did the search already. didnt find much.

 

try another ecu somtimes a bad ecu will give you weird codes i have seen that a few times...

 

Hmm found alot of oil in spark plug hole number 1 and 4. cleaned it up and it got rid of the 23 and 15 codes but 22 vtec presure switch still there.

 

Wild guess but how about bad grounds. If not I agree with changing ECUs.