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Re: Problems running at operating temperature
EGR valve; replace it. I now recall a friend having a similar problem and I looked at the truck myself. All seems well and good and the engine dies when warm. It's a freaky thing but I'll bet that is your problem.
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1989 K1500 Chev. EC
Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit.
2009 Hummer H3T 3.7L 5M (sold)
1997 K2500 Chev. EC 7.4L/ 4L80E
2018 Dodge Ram 2500 HD R/C
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