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6.5 turbo diesel


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I have a 1994 GMC 2500 with a 6.5 turbo diesel. It had been hitching some when cold, but I was traveling up the pike and it went full throttle. If I dropped the throttle back it would return to idle and the minute I gave it any throttle it would go wide open. It also won't stay running at idle.  now I can't get it to start. I have replaced the pump control mod, which did not seem to help  Any  advice?       

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