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I have a 1993 mariah with a 4.3 v-6 in it the mercarb is letting gas flow into the manifold it is running in at the bottom of the carb can that power valve go bad and let gas just pour into the intake mahifold.
I was looking at carb kits online the only thing I have not put new in it is the power jet thats why i was wondering if it could get bad and let gas pour thru the jets at the bottom of the throttle body.