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Author Topic:   Bad Powervalve??
posted April 07, 2004 10:13 PM
How do you tell if your powervalve went bad....
motor is suddenly running rich but plugs are really old only idle time when on gas black smoke can be seen out the exhausts
4412 carb
went from 78 jets down to 70 jets helped some but still some smoke on accell.. no track time yet
the adjustment screws on the metering block are turned out 1 turn each side

posted April 08, 2004 01:10 AM

Pull it out and suck on it, if you can pull the spring back by sucking on it and you dont hear air coming through the diaphram its good.

posted April 08, 2004 09:12 PM
If you have a mighty vac you can check to see when it opens or if it doesn't open.

posted April 11, 2004 06:17 PM
They are way to cheap to taste gas.Find out what size it is and replace it.

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