General Category > Quadrajet Carb Talk and Tips

Gas in Vac Port

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JMac11:
Swapping around vacuum advance, tuning out a spark knock.  Anyway, removed cap from vacuum port on base plate, cap must have been full of gas. 1/2 ton 4x4 gets about 12 mpg in town, runs really good.  What could be wrong?

Cliff Ruggles:
Front plugs could be leaking, and the fuel migrating into the cap.  Not sure otherwise how fuel could get there?....Cliff

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