The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 47-59 Need Ideas for a Chevy 235 PCV and brake booster to coexist

**Wrenchbender Ret** · 07-14-2021, 10:43 PM

you can't run the PCV hose off the vacuum outlet in the Intake manifold behind the carb. It feeds off the back cyls. & will cause a bad miss at idle & low speeds & cause a rough idle. The power brake unit only draws vacuum on desceleration so it won't cause this unless the booster dia. is leaking. There usually is an outlet at the bbase of the carb for the PCV system.
George

07-14-2021, 10:43 PM	#3
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,190	Re: Need Ideas for a Chevy 235 PCV and brake booster to coexist you can't run the PCV hose off the vacuum outlet in the Intake manifold behind the carb. It feeds off the back cyls. & will cause a bad miss at idle & low speeds & cause a rough idle. The power brake unit only draws vacuum on desceleration so it won't cause this unless the booster dia. is leaking. There usually is an outlet at the bbase of the carb for the PCV system. George