David Williamson wrote:I am having trouble figuring out where this air nose is coming from I found 3 vacuum lines un used that were just sucking in air and I closed them and it actually made the car run a bit better, but the car is still not engaging as good as it should.
I also still hear a air nose from somewhere.
I cannot find anything online about vacuum lines so I thought I would come here for a last resort and I know you all know. If anyone could help possibly a picture or video of all the vacuum lines and if they should be open or closed up, Thank you all so very much.
CHRIS.O wrote:It had a Buick v6 in it so it wasnt even a true olds anyway
Well your vaccum lines should not be too hard to figure out. Off the top of my head I can list some lines. Your gonna need one on the vaccum advance, pcv, one down to the trans, vaccum modulator I think is what that is called. May cause some problems with shifting if that is not hooked up. You also have one going to the brake power booster. I know not very specific but gives ya an idea of what should have a line running to it. Cannot think of anymore right now, those are just off the top of my head.
CHRIS.O wrote:Any open holes in the intake need to be plugged. There is one 3 port tree that has the bottom port open. You need to put a cap over that or better yet get rid of it altogether and since it looks like it has 2 other hoses that are plugged hooked into it. I looked at some of your other pictures. Did you ever hook the line going from under the front of your carb over to the oil breather on your D side valve cover?
CHRIS.O wrote:Well I was gonna tell ya to take that tree out but ya know your luck it would probably break off in the intake haha. So just get some caps for the 3 ports coming out of it. It will look a lot better than bolts in the end of hoses.
CHRIS.O wrote:If they do not go anywhere then plug them. This is what I can think of needs vacuum. Transmission, brake booster, that breather on the D side VC, vacuum advance on the distributor. Make sure these all have a good line running to them from the manifold. The vacuum advance can be either ported or from the intake. I know some may disagree but I have never noticed a difference running it to the intake or ported port on the carb. Once all those are hooked up, cap every port on the manifold and carb that is left open.
78 salon wrote:Since you're probably running a Q-jet, do a double check around the base plate. There's a couple of small vac. ports there in the back. Also, with the car running, spray some starter fluid around. If you have any leaks, the engine will speed up, then idle back down.
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