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Hope you recover well.

I’m picking vacuum of intake plenum, engine is rebuilt, sounds great, vacuum at 19-20”, great response, timing set at 16* below top dead center. Might install a electric vacuum pump my old man has sitting in the shelf. See how that does.

Just replaced the brake booster and still same problem.

Idle gets affected when brakes are applied and Yeah, idle goes down as with vacuum (2-5”) when I apply brakes, when I release brakes idle drops 8-10” then slowly comes back to 10-20” of vacuum and idle gets restored when vacuum goes back to normal.

Seems to be going bad, I can blow air and it goes through the valve. When I suck, there’s a bit of delay on opening.

Hey guys, got a weird one here, just installed new dual power booster with master cylinder. Brake only travels 1/2 down and stops rock solid with vacuum connected and when I disconnect the vacuum, brake pedal travels all the way down like it should. Also, my vacuum dramatically fluctuates when...