vacuum

I'm in the process of switching to a Howell setup, and so slowly removing all the unnecessary vac and wiring from the stock 85 setup. Does anyone know what function this 4 > 3 wire harness heading to the tranny tunnel is accomplishing? I've got Prosperos Wiring Diagram, which is generally...

I'm not sure if I messed something up or just have bad luck. I replaced my distributor with an HEI distributor. The jeep will start and idle. However, if I adjust the timing to what should be proper, it has trouble. Once I reattached the vacuum tube it starts racing. This may be a separate...

So, I have an AMC 304 (1979) so when I got it, it was partially plugged up, de-smogged, etc…. It has 3/8 MIP plugs on 3 places (2 removed currently) on the intake manifold. All 3 of the plugs had vacuum hose nipples (one had 3) on them that were rubber-cap plugged. Then there’s a weird...

Looking for vacuum line diagram for 1971 CJ5 with 225 engine

Does anyone have a diagram of vacuum line placement after converting to a Weber carb on a 1984 25

Pretty sure i have a bad booster, but wanted to run through my troubleshooting to be 100%. Hard pedal, hard to stop. Pedal hard when not running, start up, drops a little and softens a bit. I've smoke tested the vacuum system with line to booster plugged....absolutely no leaks. Check valve...

Need advice. 84 CJ7 I-6 140k ran good for a week after purchase. Seller said sometimes have to point downhill to get to start. So I'm thinking float bowl adjustment. Nope. He Nuttered it, best I can tell did right. Started shutting off on up hills then wouldn't start until sitting 10 min. Tried...

CJ I6 258 / 232 Typical Vacuum System 49 States