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From: At my Bar drinking and wrenching in Lafayette Colorado
That hose is an open vacuum leak to manifold vacuum. It has no effect on timing, but why would you want to operate the engine with a wide open vacuum leak?
To set timing, you DO want to disconnect your distributor vacuum advance, while at the same time plugging any open vacuum ports on the carb and/or manifold. Perhaps that is what you meant?
Yes definitely plug that hose. then remove the hose that goes to the vacuum can on your distributor and plug that hose as well.
Make certain you time your engine at full advance. You're looking for about 36 degrees of timing at full advance. You would like that to hit full advance by 3 thousand RPM. so use a tach to confirm this.
If your distributor is still factory stock you may need a spring kit to achieve this.
Better still. Contact Lars for his timing papers. They will walk you through how to properly time your engine.
Anthony F, your car has an automatic transmission and that hose needs to be connected to the vacuum modulator pipe. Someone has bent that pipe out of shape; it should bend over the back of the engine and connected to that manifold fitting with a short piece of rubber tubing.
On second look, it appears the trans pipe is connected and running along the upper left edge of the valve cover. It certainly looks like an open pipe at the arrow, but I'm not certain what it goes to.
probably something from the no longer there A.I.R. pump. just plug it. do you have a set-back timing light? if not, you need a 15 and 30 before timing mark. they can be done with white-out and the timing tabs.
Are you pulling our leg, Anthony? You don't expect us to believe that you drive that car around with a big, fat vacuum leak like that, do you?
Hook that hose back up to whatever it was attached to before you started monkeying around with the engine. Your AIM should tell you where it's supposed to go. If it doesn't belong there, eliminate it and block off the nipple that it's attached to on the manifold.
Are you pulling our leg, Anthony? You don't expect us to believe that you drive that car around with a big, fat vacuum leak like that, do you?
Hook that hose back up to whatever it was attached to before you started monkeying around with the engine. Your AIM should tell you where it's supposed to go. If it doesn't belong there, eliminate it and block off the nipple that it's attached to on the manifold.
Scotty
Running with no thermostat is a Bubba hack for overheating, but no one is blasting the OP for that, or his Bluetooth ignition wires.
From: At my Bar drinking and wrenching in Lafayette Colorado
Originally Posted by scottyp99
Are you pulling our leg, Anthony? You don't expect us to believe that you drive that car around with a big, fat vacuum leak like that, do you?
Hook that hose back up to whatever it was attached to before you started monkeying around with the engine. Your AIM should tell you where it's supposed to go. If it doesn't belong there, eliminate it and block off the nipple that it's attached to on the manifold.
Scotty
The entire vacuum system on the engine is a hack-job... All the TVS components have been removed, along with all components for the A.I.R. system, EGR, and EVAP. Hoses are hooked up to the wrong places, and systems/components have been bypassed without much planning or thought. The AIM isn't going to help much in this case, other than verifying that lots of stuff is missing and incorrect. Best advice: Plug all the vacuum leaks, verify the distributor vacuum advance is working, disconnect it when setting the timing, and then be sure to hook it back up. Then clean up that vacuum hose routing mess...
Lars
Hey, I for one really like these new fangled invisible ignition wires! No real need to keep them routed so as they look nice. As you can't see invisible wires. None the less, must be a hassle changing them.
Looks to me hes trying to get the engine operational after changes were made and looking for advice on the vacuum hoses. Who knows what the circumstances are. Sometimes if your not sure, its best to get in operational and then replace the hoses once you know whats what and the best way to do it..
I haven't received any emails and didn't think anyone responded, that's why i haven't been on. I'm trying to get this car back together. Yes it's a 1980 L82. The emissions stuff has been ripped out who knows how long ago and by who. I'm new to C3's and carbs for that matter so any advice about what i put back together wrong is much appreciated. The hose in question connects to the air cleaner. As best as i can tell i connected the hoses back in the same places i removed them from, so if they're wrong by all means tell me. I haven't driven this damn car since December 19th when i brought it home.
Just my .02 worth, I don’t know what the emission laws in NJ are but that would be my 1st stop. Figure out what is required and then go from there, eliminating what ever you can. Then get back to basics as others suggested.
Tough bunch in here today.
