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Old 09-17-2004, 04:28 PM   #1
jaspadafore
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Join Date: Sep 2004
Posts: 3
surges after warm up

89 gmc 1500 with tbi.....when driving it surges like it's trying to change gears (up gear, back then up then back) but if i gas it or keep on the gas to accerlate it dosen't do it....it also dosen't do it untill its been driven and is warm (for about 20mins)....what is the problem.....
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