Quote:
Originally Posted by Red
Wouldn't that also mess with the engine as it thinks it might be getting more or less air then what the throttle actually is at?
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I know on my car (and the A/T version too) the TPS is not used for fuel calculations, except for when the ecu sees a rapid change in TPS, then it gives an extra squirt of gas known as accelleration enrichment. So it only looks for a rapid change, not specific values. No problem there.
The TPS is also used to know when to go into open loop mode, so adjusting the TPS lower will keep the ecu in closed loop, which will help, too.
Other cars use engine rpm and manifold pressure to calculate fuel and ignition timing needs.