Stumbling at low rpm

92GMC

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Sep 29, 2017
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Hi and thanks for the add. I have been looking for a forum since getting my current truck. It is a 92 step side with the 305. In the morning after I back out of the garage I start picking up speed. When it gets to 20 or so it stumbles until I give it more gas or get off the throttle. I have changed the IAC,TPS and just did the fuel filter. Please let me know if you have any ideas.

Thanks,
 
Checked the EGR valve found it to be defective changed and working great again.
 


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