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Old 10-27-2010, 08:25 AM
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Engine Idle issues.

Hey guys. want to pick everyone's brain out there about a small issue I am having with my newly acquired project. I have a 72 Chevy p/u that has a 350 v8 with a Edelbrock carb that was installed on it before I bought it. I don't know a whole lot about carbs other than adjusting the idle speed and a bit about rebuilding them but nothing about adjusting anything else. the truck is running well and drivable so I am pretty sure the mixture is where it needs to be if not close. My issue is the idle speed, when I first picked up the truck from the guy I bought it from it was idling really high, and punching the pedal to get the idle to drop was not working. The carb has an electric choke and now when I start it and run it it goes down to a nice idle speed but it seems that every time I give it gas to go somewhere and then come to a stop it is idling high again and I have to give the throttle a quick punch to get it to go back down to idle and it is fine till I give it gas again and then come to a stop or push the clutch in .

What might be causing this and what do I need to look for next time I am tinkering with it. I am having no problems with the engine running or starting, it fires up pretty quickly. just tired of having to hit the throttle every time I come to a stop . any suggestions?

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Old 10-27-2010, 08:47 AM
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other people on here will be able to give much better info than I can, but it sounds like it might have something to do with the choke.
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Old 10-27-2010, 08:53 AM
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Start by checking the linkage . It maybe binding or need adjusted to give it a little free pedal .
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Old 10-27-2010, 10:40 AM
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Check the linkage, check the throttle return spring is tight, possible sticking weights in the dizzy, vacuum leak?
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