1991 c1500 5.7l surging idle

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jrmbrown93

OBS Enthusiast
Joined
Jul 3, 2014
Messages
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Hey I have a 1991 c1500 and the idle surges when u first crank it up and does it for maybe 3-5 mins then quits I have changed the fuel pump the iac the tps and took the tbi off of another truck that I know was running good I have run out of options on what's wrong could anyone please help I will try and get a video later
 
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