Small surge/hesitation while accelerating - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-02-2006, 04:40 PM   #1
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Default Small surge/hesitation while accelerating

In my 93 I dont think I am getting its full potential. When I accelerate and keep the pedal in the same position, it will accelerate, and then suddently, lets say when I pass 20 mph it will accelerate a little bit more and this gained acceleration power doesn't seem to be lost until I am at a full stop again (or mayby when I get really slow again, <20MPH), because when I accelerate back up again this behavor is repeated after I surpass a certain speed.

Everything else with the engine seems to be fine, I dont think the idle speed varies at all and it hums along at 650 rpm. In terms of a tune-up I did pretty much everything which it entails (o2, pcv, fuel filter, plugs/wires, seafoamed intake). I have done that TPS mod but that was a while ago and it hasn't behaved this way immediately after I did this mod. What are your ideas and what should I be looking at? Im suspecting my EGR valve since its pretty damn dirty and I didn't really clean it well after I put it back in the weekend before (ran out of TB cleaner).
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Old 06-02-2006, 05:59 PM   #2
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Forgot to add that coils tested to be between 5.9-5.95. Tested about 10 mins after engine was running.
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Old 06-06-2006, 08:13 PM   #3
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Anyone have any musings? The symptoms are getting worse.
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