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Re: '89 350 tbi 5 speed stalling and surging idle
check you throttle body gasket for a leak. an easy eay is to spray 2+2 carb cleaner at the base of the throttle bodyif it stalls out that means the gasket is bad. ot the pcv valve opening in the throttle body could be plugged that would cause back pressure in the motor an couse it to run crappy. these are the things i ran into on my s10. they are basically the same. hope this helps.could also be a vacume leak.
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