Thread: Idle

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Ok guys i think ive narrowed it down to vacuums.. i had a hose running from the back of the engine to the intake manifold. i squeezed it off and the ropms droped 500... there isd another vacxuum port on the front of the bottom of the carb that i pluged off weith my finger and it dropped.. guys i need help with what vacuum goes to wat place??

Please go through the gasket leakage and other vacuum loss scources first. Then hook up PCV to the side port that the booster is attached to.Then attach the booster line to the manifold source usually at the port on #5 intake runner. I'ts a good start to get this thing settled down. Please go thru the leaks first.

Ok imma give u a list of vacuum options i have... ok i have the brake booster vacuum port, i have the port on the intake behind the carb.. I have 3 vacuum ports on the holley 600 carb.. Then i have a tube coming from the back of my engine. and then i have a tube coming from my tranny with a vacuum tube on it..

nowhere right now... so the front port that u marked should be pluged off?

That open port is a huge sucking vacuum leak. You should also think about moving your vacuum advance to a port below the primaries, like the one you have open in the pic.

Originally Posted by Shavenlaidblaze

Ok imma give u a list of vacuum options i have... ok i have the brake booster vacuum port, i have the port on the intake behind the carb.. I have 3 vacuum ports on the holley 600 carb.. Then i have a tube coming from the back of my engine. and then i have a tube coming from my tranny with a vacuum tube on it..

Brake vacuum and PCV vacuum should go on the large vac. ports (intake manifold, or rear of carb) Vac. advance, and Tranny vac. line should go on 2 of the three small ports near the base of the carb. Plug any unused vac. ports. Someone here will correct me if I am wrong.

ok, thanks......................I learned something today.

Who said ya can't teach old dogs new tricks........LOL. We never stop learning. Even the simple things. Good job people. I like this forum a lot.

Ok guys thanx for all the help imma try all this tommorow after i get off work.. I work at budweiser and im about to head there... thanx alot guys..

Sounds like "Blaze" is gonna hafta consider shipping cases of Bud for these great suggestions...whaddya think? LOL

Well i fixed all the vacuums and its still idling at about 11-1200

HHhhhhmmmmm.....double check by taking some NON-Chlorinated Break Cleaner and spray along the intake mount surfaces. How did the pinch off of the brake booster go. Did I miss that? There's always a simple solution this and we can't be there to help except for being here. You either have throttle plate missalignment or a vacuum leak still. Post back please and let us kow what is still happening.