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Re: 1993 K1500 running rich
If the warmed up idle speed is about 1100-1200 RPM, and the temp gauge only goes ¼ the way up, the thermostat could be bad.
If the engine runs cold, it will run rich.
The truck should have a 195 degree thermostat in it. I suggest using a STANT brand thermostat.
If you have an infrared thermometer you could test the temperature right by the coolant sensor in the intake.
Take a look at the injectors just after the engine is shut off and see if they drip.
Smoke lingering out of the tailpipe could be from coolant getting into the combustion chamber. Head gasket failures are a problem on these engines.
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For those of you that are wondering why you are not getting replies to your thread:
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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