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    5,7 TBI - low idle when engine is hot

    Hello. I have a problem with my truck. It's a 1988 C1500 with a 350 tbi and th700r4. The truck works fine when cold, but after driving a while and engine is hot the problem starts. It seems like rpm is too low at idle and when i step off the gas pedal when driving. And voltmeter drops down...
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