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Discussion Starter #1
I have a stumble at 4800rpm in 2-4 under hard acceration.
I have a vortec running 10 pounds of boost with 42lb injectors. First gear is fine and it doen't lose fuel pressure. Any ideas? I do have a sct tuner.
 

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Moved to "EcoBoost & Forced Induction Chat"

Perhaps the guys in here will be able to help. If not technical chat would be the next best thing.

Some additional information would be helpful, year, engine, milage...all great things
 

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^Check your plugs plugs and gap. Honestly, I would just throw a new set in there to be safe. Check the plug wires and and all too.

Just last week my ST would stumble when it went under moderate load. Check the plugs and gap; perfect. Plugs looked to be burning fine. Put a new set of 103's in yesterday and the stumble went away.
 
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