Map Sensor And IAC Trouble

NVR2MCH · #1 (**permalink**) 08-13-2010, 09:05 PM

My map sensor reads different than on the dyno. My TPS jumps all around. The car shows a IAC fault. I have all the grounds directly to the battery. All the 5 volt sensors are reading wrong. The car will not idle or drive at a steady speed. I have triple checked the wiring. Anybody have any suggestions??

David_H · #2 (**permalink**) 08-13-2010, 10:44 PM

Maybe noise are the wires away from other noisy wires?

NVR2MCH · #3 (**permalink**) 08-14-2010, 09:25 PM

I have grounded all the wires to the battery. I have seperated and insulated all the wires in engine bay. I even changed the coil to a rubber mount to eliminate that also. It is all my 5 volt sensors. I just had my fast xfi box rebuilt by fast. Should I send it in and have it checked?

TurboNova · #4 (**permalink**) 08-14-2010, 11:50 PM

Unplug each sensor and check each for 5v where it is needed. Use a volt meter to check it.