867 Posted September 5, 2021 Report Share Posted September 5, 2021 It's not always the case, but sometimes the TPS value changes when the engine is started, why is that? Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 5, 2021 Report Share Posted September 5, 2021 That would usually be a weak ground. In some cars the sensor ground is connected to the engine, so if the main engine ground is not good you can have some ground offset on the sensor ground. Quote Link to comment Share on other sites More sharing options...
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