Join Date: Oct 1999
Location: San Leandro, CA bay area
Feedback Score: 0 reviews
There are actually three harnesses.
Fuel temp: fools the ECM into thinking the fuel is hot and thin. The ECM Will actually compensate for the thin fuel and inject more per combustion event. This does Does work Fairly well. BUT as you drive and the fuel starts to heat up you will notice less and less power as the fuel gets hotter and hotter. A fuel cooler will help this a bit.
The second is the boost sensor: Fools the ECM into thinking boost is higher than it actually is. This will dump more fuel down low and spool the turbo faster. IT will however smoke down low and isn't good for motors still running the Oxy Cats
Third is Intake air temp sensor: this fools the ECM into thinking that the air is Colder than it actually is. The ECM will adjust the timing to compensate.
For the money their not a bad mod. But don't expect a night and day difference. Maybe .2MPG MAX.
They really don't do much on a Non Acert motor. The pre emissions 3406E's do better with injector trim codes and fuel tables. Good luck finding a dealer that will still fiddle with these though as mother cat will have your nuts if they catch you doing that without their consent.
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