| Primary throttle plates and linkage slop [message #261275] |
Mon, 08 September 2014 06:35  |
budworks521
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
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I got my rebuilt carb back and installed. I noticed that once it is all together that the accelerator pump linkage/primary throttle plates to the gas pedal has some wear (rubber retainer and slip ring) which seems to keep the primaries slightly open at idle. If I push the throttle linkage forward the plates move a tad bit and the idle slows dramatically. I have slight popping in the carb at idle and if you throttle it it goes away. My intake had some carbon build up in the primary area and number 5 and 8 plugs had carbon on them. My question to the veterans out there is: will new parts (available from GMC place in California) cause more tension on the plates to close them tighter? They seemed tight when I got carb back and explained this to the rebuild guy. He said he worked on getting the plates tighter. Also, has anyone ever run into a scenario where the ignition module and coil pack on top of the distributor tested within parameters and still worked wrong. My vacuum is good and my compression testing was good. Thanks
1974 Painted Desert
455 upper half rebuild
constant project inexperienced mechanic
Grand Rapids Mi
Always trying to learn
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