This past weekend I took my 2012 evo x mr to a rally, round trip about 700 miles. I was on open throttle most of the time. Everything was fine until on one of the stops I turned the car off for about 15 minutes and started back on and it seems as it was misfiring rpm's were jumping between 700-1500 and ASC service code came out. So I looked at the spark plugs and wires and everything looked fine, than though it was only bad gas.

Than p0657 code came out (actuator supply voltage "a" circuit/open) as well as Engine service system required light. I drove about 50miles and p0606 (Control Module Processor) code came out and that is where I'm at now. It's cutting power to the car, unusual shifting and minimal throttle response had to tow it back home.

What should I be looking for? I replaced a control motor rally but still nothing. Any tips/suggestion are appreciated.

Current mods:

-93 pro tune
-hks hi power exhaust
-test pipe
-intake
-3port boost control
-uicp

 

if i were you i would do a compression test just to make sure all is well in that dept.
If that checks out, i would try to reach to your tuner see if he can see whats up with the codes. good luck man hope your issue is not major.

 

Thanks, I hope so too.

 

I let the car sit for 3 day, just changed the oil and and rechecked the relays and car starts and drives with no issue. Drove 20 miles and no codes or anything...

 

P0657 is for the throttle body. Replace the relay for the throttle body, and check electrical connections. See this thread:


https://www.evolutionm.net/forums/04...dtc-p0657.html