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Remove the negative battery cable for 30 seconds. This works on pre '96 cars.

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โˆ™ 2015-07-15 19:36:45
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Q: How do you get your check engine light to turn off after you replace the intake air temp sensor on a '93 Geo Metro?
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Where is vacuum sensor located on a 1991 Chevy Metro 454 engine?

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The IAT (Intake Air Temperature) sensor measures the temperature of the intake manifold. The ECM uses this sensor reading to set injection timing and adjust the air-fuel ratio. If the fuel mileage and power output of you engine seem low, some owners have found improvement in EGT, fuel economy, and power after cleaning carbon from the IAT sensor in at the rear of the intage manifold. Engine with exhaust brakes are particularly prone to IAT sensor fouling because soot is blown back into the intake during valve overlap.

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