Thread: idle waaaay too high.
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08-03-2006 08:48 PM #1
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idle waaaay too high.
i took my 82 350, with hei and a quadrajet, for a light break-in cruise last night and it ran fine, except for an off-idle stumble once it warmed up. got home, shut it down, went to bed, and didn't adjust anything on the truck. tonight, i started it up, and it is revving insanely high. i was not about to put it in gear revving like that. i rummaged and found no vac lines loose, and the intake manifold seems to be sealing well. before i spend tomorrow's few after-work daylight hours hunting, does anyone have a suggestion?
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08-03-2006 09:38 PM #2
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the choke was one of the first things i checked. linkage is adjusted fine.
the fact that i can cup my hand over the whole carb, primaries and secondaries, and the idle does not change bugs me. i do not know how a vacuum leak of that size could develop overnight without the vehicle even being touched. weird.
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08-04-2006 05:49 AM #3
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Sounds like the secondaries are sticking. Try loosening,then retightening the four carb holddown bolts. If one is too tight, it can twist the carb enough to cause this.
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08-04-2006 06:45 AM #4
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Any chance the throttle rod is catching on something and not allowing the carb to return to idle?C9
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08-04-2006 07:58 AM #5
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nope, i've checked those things. secondaries move properly, throttle moves smoothly. no vac lines disconnected. i certainly want it to be something along those lines, though. something like a leaky manifold is a much bigger pain. i'll give it all a better look when i have some daylight.
thanks
out of curiousity, how many vac lines are NEEDED to run a quadrajet? i know a lot of that mess is purely emissions control garbage.
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08-04-2006 11:08 AM #6
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maybe when i get home from work i can snap a few digital shots.
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08-04-2006 11:17 AM #7
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PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.
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08-04-2006 01:03 PM #8
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Turn it on and maybe try spraying some wd-40 around the intake area see if rpms change.Pay attention to what you spray when rpms change.If you do this, use a plastic bottle sprayer.If you hit a power lead with a metal can you can blow you hand off!!!!AND DON'T SIT THE CAN ON THE BATTERY!!!!!!!You can also use a soapy solution also.
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08-04-2006 02:48 PM #9
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i used propane to check, like i used to on my old honda. nothing. i just really find it strange that it was fine when i shut it down wednesday night, and totally messed up 24 hours later, without me touching a thing. i don't think i'll be off work in time to mess with it, today, but i have all tomorrow to mumble profanities at it.
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