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post #1 of (permalink) Old 12-26-2005, 04:44 PM
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Carburetor/Vacuum Lines

Ok Guys [img]/ubbthreads/images/graemlins/smile.gif[/img] Im going to try this again. I just completed the nutter bypas on my 89 Wrangler. It went smoother than I thought but need info on what Vac lines to keep, and which to ditch, I have a stock 258 Carter, (I know its crap) but just want to get this thing running before I go to upgrading, have read alot about ign upgrade, MC2100 carbs, yada, yada, yada. That will come second. First I need to know things on the carb such as where is port vacuum/manifold vacuum etc, do I still need the solenoid vac with the nutter complete? Ive seen all the diagrams but I need pics, digitals, whatever. Things like my CTO switch has rubber caps over everything, there isnt vacuum line one attached to it. The website is helpful to a point, but is only good if you have exactly what they have. Hope everyone had a great Xmas. Thanks, Bill
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post #2 of (permalink) Old 12-26-2005, 04:57 PM
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Re: Carburetor/Vacuum Lines

When I did the nutter bypass on my jeep I re-ran most of my vacuum lines since most of them were missing or hooked up wrong. I used the diagrams on this site to do it. And it made a world of difference. Hope it helps.
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post #3 of (permalink) Old 12-26-2005, 05:00 PM
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Re: Carburetor/Vacuum Lines

That's too new for me to know anything specific, but here's how to tell the venturi and manifold vacuum ports apart. Manifold vacuum is below the throttle plates, all the way at the bottom of the carb. Anything at or above the throttle plates will be venturi/ported vacuum. Exactly where it is controls the speed/load/throttle position/vacuum map.
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post #4 of (permalink) Old 12-26-2005, 05:16 PM
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Re: Carburetor/Vacuum Lines

Use your finger - at idle - manifold vacuum is strong, ported is 0 or near 0.
Ported increases as the R's increase.

Ported goes dirctly to the distributor - no solenoids or anything else.

Plug the line to the EGR valve.

Any unused ports get plugged off.

Set timing to about 8 degrees, ignore stickers or books that assume you have it hooked up in the stock configuration.

Not smog legal, but will run better than it ever has.
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