Occasional fuel loss?

[1987 GMC Jimmy]

Do you already have one of the thick OEM carburetor gaskets? The stock gasket is flexible, and it should be close to about 3/8"-1/2" thick. It should provide quite a bit of insulation just by itself.

I've tried using a phenolic spacer (Mr. Gasket?) with my Quadrajet, but had problems getting it aligned so that the throttle plate did not bind on anything. There is a little play in the bolt holes, and with a spacer you have to get two gaskets, a spacer and the carburetor all properly aligned. I finally decided that I didn't really need the spacer.

Bruce

I do. This really feels like some kind of heat soak issue, but I don't know how to remedy that. All I know is that it doesn't happen when the ambient temperature is below 75*. It'll surge a little on acceleration when it's really really hot outside, and it'll do that hesitation on the first acceleration off the line.