Brake Booster issue?

AJ/FormS said
Did you measure the pushrod extension before you bolted on the M/C? If the rod was much too long,I suppose it could possible that when you mated them, the pushrod was driven backwards breaking the valve.

At first the pedal would not return so I did some reading and sure enough it was out of adjustment. I lengthened it a bit and I have better pedal feel. I only drove the car out of my garage about 20 feet and new something wasn’t right. That’s when I noticed the air escaping after shutting the engine off. Weather has been crazy here on the east coast. So a few more weeks before I can get it on the road. Thanks for the response.

BillGrissom said
A missing check valve isn't your problem since the check valve is stop air flowing the other way (into booster), but you do need one so the booster can store vacuum in case the engine dies and you need to stop. First, insure your pedal is coming up all the way. It shouldn't bottom out on the brake lamp sense switch. Amazing how many people don't understand that, and the switch is adjustable. If the brake pedal were pushing in a bit, then it would leak air since that is what the air-valve does. If the pedal is all the way out, then sounds like the booster is bad - either a bad air-valve or a torn diaphragm.

I did notice the pedal not returning and I needed to adjust the rod length. I do have better pedal return but the brake light is not adjustable. One think I didn’t look at is if the new rod coming through the fire wall is rubbing on the brake pedal. And I’ll look at getting a check valve and see if that does the trick.

Thanks for the response.