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Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue
The engine will not warn up as quickly as the air does during the day.
The sensor readings look close enough.
Another test you can do is run the engine up to operating temperature (195), shut it off, and see what the resistance is when warm.
My guess is, the sensor is not the problem.
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Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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