Project 67 DRGNWGN - 67 Burban!!

[kev2809]

hey Leon... I bought new o2 sensors last week and put them in, same issue... I'll check the plugs. I cranked it again about an hour after shut down and it started right up.

I checked the spring last week and it's there for sure.... wonder if it could be worn out. is it a common issue?

[LockDoc]

Originally Posted by kev2809

hey Leon... I bought new o2 sensors last week and put them in, same issue... I'll check the plugs. I cranked it again about an hour after shut down and it started right up.

I checked the spring last week and it's there for sure.... wonder if it could be worn out. is it a common issue?

Good deal on the startup. That is a good sign.....

I don't think you are going to ever wear that spring out. It is tough. I have seen them break though, that is why I asked.

I found this post by Accelo:

Your Pedal check valves are damaged. Power brake sluggish return is almost always the relief valve built into the sealing ring at the plunger input failing to let in fresh air and you're fighting a vacuum from the other side. It allows the diaphragm spring to overcome the engine vacuum and return the brake pedal to the normal position. In all likelihood you will need to replace or rebuild the booster.

Another thing you can try is to unhook the vacuum line to the booster (plug the manifold side) and see what the pedal does.

LockDoc