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Engine missing at low idle and take off.

(1996 Chevrolet S10)
in Nacogdoches, TX on March 19, 2011
Diagnosis says fuel tank pressure sensor, purge valve solenoid, mass air flow, loose vacuum could be the problem. I have changed and checked all of these plus two other sensors and no change in the problem. Please help me! What else could it be?
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Popular Answer
on March 19, 2011
I have seen where cleaning a dirty throttle bore has fixed this. The coking buildup causes turbulence to the air flow and causes stunble when accel and slight rough idle.
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