Code 12 leading to misfire

IwantMKIII

WVU MAEngineering
Jun 12, 2007
2,477
0
0
Perkasie, PA
Messed around with my ISC tonight, just changed the gasket trying to fix my high idle. I start up the car and notice its acting very funny.

Check for codes just in case, 12 comes up, RPM signal

Didn't find much info on it but came across the option of moving around the CPS wires. Checked codes again and no CELS anymore, however still acting like it had code 12. Serious miss of some type :3d_frown:. Very messy sounding when i hit the gas pedal and vibrates the car quite a bit.

Fouled plug maybe or something else??
 
Last edited:

sneakypete

Regular Member
Jul 18, 2007
1,129
0
0
Central NJ
i think i have the same problem. did it seem like a very serious miss? heavy vibrations and loss of power? i think its my injector too
 

IwantMKIII

WVU MAEngineering
Jun 12, 2007
2,477
0
0
Perkasie, PA
sneakypete;952876 said:
i think i have the same problem. did it seem like a very serious miss? heavy vibrations and loss of power? i think its my injector too

pull each spark plug wire from the coil packs one at a time with engine running. If the engine bogs down then that spark plug/wire/injector are ok. If it sound the same....that's the cylander you need to look at.