I have a 87 chevy camaro with a 350 and the iat sensor is no where to be found so i want to know where the wiring harness comes from so i could just reinstall because ive looked everywhere for it already and cant find it!

 

If it is a 350 TPI the IAT sensor is underneath the back of the plenum. The wiring connector that goes to it comes from the main harness behind the motor.

 

you have to remove the runners and plenum. Much easier that way.

 

thanks lot but i cannot find the connector that plugs into the sensor ive look everywhere already by the distributor so i just want to reinstall it

 

It is "upside down" up into the bottom of the plenum. With some long nosed pliers, you can reach the plug & unplug it, but actually getting the sensor out is another thing. Just go ahead & do the IAT relocate mod & it will read the incoming air better & be easier to service in the future, if needed.

If it has simply come unplugged, it will be laying between the runners, under the plenum.

 

locate your ecm. Locate F16 (tan wire). Run a wire from there to the IAT sensor. Now locate your tps. Locate the black wire on it. Splice into the black wire. Now I would run this one to the IAT sensor. That should work out for you.

 

Remember there are three wires coming off of the TPS. One is grey, one is dk blue and the other is the black wire. The other side of that black wire should go back to the ecm, to one of the grounds. You only need to splice into it at the TPS and run the wire to the IAT sensor.