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Miss/stumble at any unloaded rpm range when warm

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Guys ive had this issue for a good year,  ONCE the truck gets warm it acts Real missy at idle in Park, and any unloaded rpm range. ONCE i. Put a load on the engine it doesn't mess up. Does not mess up when first start either.   Changed injectors 3 times no change, New vp44 2 months ago. No change 

 

No codes.    Nothing seeems out of place. 

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  • Owner

Did you test the injectors to see the spray pattern or pop pressures?

 

Do you have air in your fuel? You might hook up a piece of clear tubing and loop it on the windshield and see if there is any air bubbles.

This sounds similar to my issue, although I do not know if it goes away under a load. How bad is it missing? It it making the motor lope or just one cylinder seem to be messing up?

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