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PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 69 400 FB - After 15 to 20 minutes the idle drops, engine surges, then stalls
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Old 06-07-2026, 12:01 AM
DOC DOC is offline
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Gas tank vent plugged?

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Old 06-07-2026, 07:41 AM
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Elarson Elarson is offline
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Gas tank vent plugged?
That's my initial thought. Takes awhile to develop a slight vacuum in the tank that fights your pump. Easy enough to check by loosening your gas cap.

Eric

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Old 06-07-2026, 08:22 PM
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freebird69 freebird69 is offline
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Gas tank vent plugged?
Doc, how can I check if that's a problem?

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