Chuci wrote:
I agree with fixing my vacuum system. Is there any way to check to see if I am getting vacuum? I’ve kinda just been unplugging a hose and check to see if it would suck on my finger
Yea, probably the best way is to see if you can find a vacuum gauge kit, should be around $20 (Amazon has one for 17.50) it will have a rubber hose and some little nozzles you can stick in tubes to measure it. It's a bit of fiddling, but not hard. Also these jeeps aren't terribly complicated on the vacuum side. I saw you had issues with the vacuum line where it connects to the dash, I'd start with testing it right there, or even just blocking that port off (thus reducing the vacuum system to "only under the hood")
It's just a process of elimination. Make sure you have vacuum in that big line going to the brake booster (if not the vacuum pump or the hose to it has failed), then make sure you have vacuum at the little line coming out of the brake booster (if the pump is working and there's not enough vacuum there it's likely the seals in the brake booster have failed or something is jammed with the pedal or something weird like that?). If both of those check out (it actually may be easiest to do it backwards, check the little hose first, then take the big one out if it doesn't build vacuum), block the little line and you should have brakes again. Work your way though the system and see if you can locate a failure. I'd block off the tee to the dash stuff while I was testing it, get the under hood stuff fixed first. I think you should see around 25inhg on your vacuum gauge. (might vary a bit, but I don't think less than 20 is ok) Note that after the turbo modulator valve it will be lower, that's normal.
I'll look at mine tomorrow as I'm not 100% sure how everything is routed, but we should be able to figure this out pretty easily.