need help with braking issue
Thread Starter
Racer
Joined: Feb 2011
Posts: 310
Likes: 9
From: Miami Florida
need help with braking issue
Ok guys so I have a 2001 c5 with a procharger and cam. I've been having this issue where when I brake after the first pump I loose brake pressure. I've changed the brake booster and master cylinder and car is still acting the same. Ive checked all the vacuum lines and everything seems to be fine. I need help please and thank you in advance.
Safety Car
Joined: Mar 2009
Posts: 4,095
Likes: 42
From: Pewaukee WI
Sounds like air in the system.
After the first "spongy" pump, does the pedal firm up?
I would take it to a reputable auto shop and have them pressure bleed. I wouldn't consider a GM dealer suitable (sorry, just don't trust dealers)
After the first "spongy" pump, does the pedal firm up?
I would take it to a reputable auto shop and have them pressure bleed. I wouldn't consider a GM dealer suitable (sorry, just don't trust dealers)
Le Mans Master
Joined: May 2005
Posts: 6,366
Likes: 249
From: Fort Lauderdale, Florida
You might need to speak to a cam expert. It could cause a low vacuum at idle which might need a vacuum reservoir to accumulate vacuum for stopping. I'm no expert on this but this can be a duration problem with blower cams. It might have nothing to do with a vacuum leak. A blower cam can possibly not suck enough air at idle. Depends on what you've got.
