|Intake Air Temp Override|
|It's a little known racing tip that you can unplug your IAT sensor and you will trick the onboard computer into thinking that it's 32 degrees out (creating a rich fuel mixture). The downside of unplugging the sensor is the PCM realizes that there is no signal returning from the IAT sensor and will cause a SVS light to come on. There's a cheap (I mean dirt cheap) way of overriding the sensor and you won't get a SVS light. SLP Engineering has an override kit for the Grand Am (which they sell online for $25.00), the part we have listed here is less that 25¢. Using an ohm meter we determined that the resistance going through the sensor was 3.3Kohm when the outside temperature was about 45-50 degrees. So the resistor acts as a jumper and returns a 3.3Kohm load to the ECM (bypassing the sensor itself). Returning the 3.3Kohm will cause the ECM to look up the optimal air/fuel mixture for that temperature (when it's warmer outside, this will cause a rich air fuel mixture). A rich fuel mixture will help eliminate any potential detonation.|
is all you need:
1 3.3Kohm resistor (orange,orange,red,gold) (available at Radio Shack for $.50)
|1. Locate the IAT (Intake Air Temp) Sensor located on the back side of the rubber boot between your throttle body and your MAF housing and unplug it.|
|2. With the IAT harness unplugged bend the resistor into a "U" shape and insert the plug into the two sockets on the harness.|
3. With the resistor snug in the harness, just tape up the harness with electrical tape. Make sure it's sealed really well so water doesn't get in the harness.
|4. You're done. You'll want to put a piece of tape over the IAT sensor to ensure no water gets into the sensor or intake air tube.|