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Old 08-03-2010, 01:57 PM   #54 (permalink)
cfg83
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Join Date: Dec 2007
Location: Southern California
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1999 Saturn SW2 - '99 Saturn SW2 Wagon
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C3H8 -

Quote:
Originally Posted by C3H8 View Post
have messed with a potentiometer on my tps. it didn't change my air-fuel ratio's at all, but it did change my ignition timing, if i tricked the computer into thinking the throttle was closed more then it really was. the timing went up a few degrees. it also lowered the rpm's at which the transmission shifted. the torque converter stayed locked up more, and the engine went into open loop under acceleration a lot less (almost never). all good things for FE.
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Since a lot of people can't directly control when their auto-tranny shifts, this sounds like a neat mod.

CarloSW2
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