Hey Guys,
I just bought my 1997 Pontiac T/A in July. Now I have a misfire. I hooked up my car up to the scanner and it brought up several codes, including EGR, EVAP canister and most importantly MAF circuit. I looked at the MAF sensor itself and it appears fine. When testing the harness however there is a voltage drop of about 1-2 volts. The previous owner over-heated the car and replaced the heads and several other components. The MAF harness appears that it melted slightly, it appears to have silicon on it to try to heal the damage, now it is no longer healed. My question is, How do you replace the MAF harness? and How much it is? Thanks,
Ray

 

You can cut out the bad section of wire and splice in good wire (soldered). If the connector itself is bad, your local parts store might carry a replacement; here in CA PepBoys carries several of the GM connectors.

 

How do I know if for sure it is the harness and not the sensor? The wiring appears damaged, but it isnt in concrete that-that is the cause.

 

If you can see something that might be at fault, fix it and go on to the next thing. Look on my wiring page for p/ns for replacement pigtails (if needed).

 

I replaced my connector to the MAF sensor and it made the car run better but not perfect. I cleaned the air filter as well with the K&N recharge kit, the car still misfires. The scanner said the EGR, and the EVAP as well as the MAF sensor circuit. Any other ideas?