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Old 12-30-2012, 11:04 AM
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I would check the easy stuff first before I dive into the carbs for a rebuild. Take a can of carb cleaner and spray around the base of the carbs, around the carb fittings. It the idle changes then you found a leak. Make sure the linkage is not binding. Make sure the floats are not sticking alowing the fuel to bypass the needle and seat. Holley's don't need alot of fuel pressure (5.5 psi should do it). It is possible that just the temp change alone it the culprit. The air density changes from summer to winter and minor adjustments are required. Dry rotted and cracked vacuum line?
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