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> Knob on ecu
stateofidleness
post Aug 29 2010, 09:22 PM
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The knob on the ECU, I thought, is used to adjust the mixture of fuel/air?

I have it all the way clockwise, but changing it appears to not give any noticeable difference in the way the engine runs. Trying to chase a bad cold idle and trying to eliminate that as a possibility.

Can someone educate me in the proper usage of that knob and what effect rotating clockwise/counter-clockwise will have?

Thanks
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TheCabinetmaker
post Aug 30 2010, 08:53 AM
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Yep! The throttle position sensor must be properly set before the idle mixture screw wil make any difference. ECU knob will not make any difference in the way it runs, but a maladjust on the TPS will! Your crappy cold idle is more likely to be the head temp sensor.
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