Thread: No brakes after boost...

um it should

You need a check valve on the brake booster line. When you don't have one or it is faulty you get your exact symptoms. I've never actually looked for the check valve so I have no idea where it is or if it's integral to the brake booster.

It's along the firewall on the hardlines I believe.

Yah that's ringing a bell. On the right side of the hard line behind a firewall mount. I mean you take apart where the line is held to the firewall there and under that is the valve I believe.

Thanks guys. Appreciate the help!

Weird never new it was there, looks like it's sandwhiched between the hard line and the hose. Probably why I never noticed it .

It's actually hidden behind the "bracket" that holds the hardline to the firewall. Not something many people notice, unless you've torn it apart once or twice while troubleshooting.

I am assuming he teed in to the booster line for a vacuum source? This is why I never advocate that source for vacuum...

No, I know better than that. I drilled/tapped for gauges, bov, etc..and relocated other lines that normally pull from the NA intake tract.

I questioned the vac line for the booster before, but I thought there might be some sort of check valve or something integral with the booster. That, and I've never seen a thread concerning this before.

Wow interesting. Did you solve the problem?