The Ford Barn - View Single Post - Y Block Normal Vacuum w/mild Perf. Street Cam?

scicala · 04-21-2024, 04:50 PM

If you can turn the idle mixture screws all the way in without the engine getting rough and dropping RPM (at a reasonable idle speed), then remove the carb to access the power valve cover. Square cover with 4 screws holding it on. If there is fuel under the cover, it means the power valve rubber diaphragm is ruptured and needs to be replaced.

Sal

04-21-2024, 04:50 PM	#20
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,712	Re: Y Block Normal Vacuum w/mild Perf. Street Cam? If you can turn the idle mixture screws all the way in without the engine getting rough and dropping RPM (at a reasonable idle speed), then remove the carb to access the power valve cover. Square cover with 4 screws holding it on. If there is fuel under the cover, it means the power valve rubber diaphragm is ruptured and needs to be replaced. Sal