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Rough idle, throttle does nothing

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Rough idle, throttle does nothing

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Old

Mar 14, 2016 | 09:49 PM

#1

mountain dewd

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From: O-O-O-Oreilly's

Rough idle, throttle does nothing

Well, I am not making very much progress as of late. When I start the truck up, it idles pretty rough. It starts easily though. The timing is (supposedly) dead on with a light and the dwell is right around 30. Weird thing is that the throttle has zero influence on the idle. It will make a sucking noise, but it won't change the rpm a bit. Distributor is a new reman unit, new points and condenser, new vacuum advance. Any ideas?

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Old

Mar 14, 2016 | 09:55 PM

#2

whomrig

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From: SF Bay area

From what you describe, I think you have a vacuum leak that you need to find and repair.
the dwell as I recall needs to be 28 deg.

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Old

Mar 14, 2016 | 09:56 PM

#3

mountain dewd

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From: O-O-O-Oreilly's

Thanks for the quick reply! I have sprayed starter fluid all around the manifold, base of carb, and vacuum hoses and had no indication of a vacuum leak.

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Old

Mar 14, 2016 | 10:05 PM

#4

whomrig

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From: SF Bay area

are the plug wires in the correct firing order?

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Old

Mar 14, 2016 | 10:07 PM

#5

mountain dewd

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From: O-O-O-Oreilly's

I am 99.99% sure they are. There were times that it ran okay, but it seemed to get worse as I fiddled with it.

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Old

Mar 14, 2016 | 10:12 PM

#6

whomrig

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From: SF Bay area

try this
disconnect the vacuum hose to your power brake booster and cork it. start the engine and see if any change.

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Old

Mar 14, 2016 | 10:13 PM

#7

mountain dewd

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From: O-O-O-Oreilly's

Thanks for the idea, a little late to do it tonight, but ill put it on the list for tomorrow.

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