The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - No brake pressure when engine is running?

boostat4500 · 07-22-2007, 08:05 PM

I wasn't considering steel braided to be rubber. But I guess on the inside it is. I just meant there's nowhere for line bulging to occur. I've got a new booster and corvette master on now. It's a little better but still not great. I tried plugging each port one at a time both before and after the parts swap. Both times the pedal is hard with one port plugged. Same whether front or rear. Also, the pedal is slow to return after depressed. Is that a proportioning valve problem?

07-22-2007, 08:05 PM	#9
boostat4500 Registered User Join Date: Aug 2006 Location: Reno, NV Posts: 346	Re: No brake pressure when engine is running? I wasn't considering steel braided to be rubber. But I guess on the inside it is. I just meant there's nowhere for line bulging to occur. I've got a new booster and corvette master on now. It's a little better but still not great. I tried plugging each port one at a time both before and after the parts swap. Both times the pedal is hard with one port plugged. Same whether front or rear. Also, the pedal is slow to return after depressed. Is that a proportioning valve problem? __________________ 1971 Suburban 4x4, LQ4 6.0L, 4L80E, etc. Last edited by boostat4500; 07-22-2007 at 08:31 PM.