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Old 02-01-2012, 12:55 PM   #13 (permalink)
Sparkplug Hunter
Join Date: Feb 2012
Posts: 1

Hi there a newbie to this site here. My experience with my 91 6.2 K2500 man 4 spd ext Cab w/ long bed and currently with 265,000 miles!!!, I found a few years back the same- making a turn and the engine would surge while at a lower speed. I found everything as it should be (hoses, lines, cable etc.) except the electric lift pump was out and the engine still started and ran fine. Although when starting cold it would smoke a blue/ gray for a few(5-15) seconds before clearing up. After replacing the electric lift pump problem went away. also verify the fuel relay. Good luck.
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