Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - bucking, stalling, but only on the highway
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Old 07-02-2012, 02:14 PM's Avatar is offline
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I once had an old GMC Suburban that would do similar things and only when the outside temps were above 80 degrees.

After much greif, nashing of teeth and dis-assembly of most every component.. Three different new fuel pumps. It turned out to be the nylon "sock" on the fuel pick up, in the gas tank.

Someone, at a previous time, had poured something very strong into the fuel tank and the sock melted/shriveled up like an insect cacoon.. Amazing any fuel at all came thru it.. Look for a restriction in your fuel line..
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