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Potential Tuner
00 3800 impala N2o tune
Cant seem to find what im looking for. I want to be able to hit the gobutton and have the ecm go into another timing map and fuel map for a dry N2o system. can this be done w hp tuners?
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Senior Tuner
Never done this so take it as it is.
This is what I would do;
wire a relay and low imp resistor into your Iat ckt.
When relay is commanded on it bypasses the Iat sensor, runs through the resistor (low impedance) to tell the pcm that your Iat is very cold (something you wont really hit like -22 to -40) then pull your needed timing from the IAT Spark correction.
Then have your "GO" button activate the relay.