Thread: IAT sensor mod?
View Single Post
Old 11-17-2008, 05:31 PM   #4 (permalink)
Master EcoModder
Join Date: Jul 2008
Location: Silly-Con Valley
Posts: 1,417
Thanks: 173
Thanked 226 Times in 174 Posts
"Performance Chip", AKA "a resistor".

Scam-o-rama, all the way. Makes your fuel injection "think" the intake air is colder, so it fattens up the mixture a little. Until the O2 sensor sees that there's too much fuel, in which case it leans out the mixture again until it's normal.

In some cases, it may be enough to go "open loop", where the FI ignores the O2 sensor so you'll actually get that extra fuel all the time. Some extra fuel can result in a little teeny bit of extra power. More pollution and higher fuel consumption in that case, of course.

  Reply With Quote