My 03 lb7 studders for a second when it hits 3200rpm. It doesn't do it with a stock tune but ive tried 3 different programmers on it and they all do the same thing. Almost acts like its starving for fuel for a second. Any ideas?
Replace your fuel filter. It's probably getting close to the end of its life. Not restrictive enough to slow fuel flow on the stock tune, but on a bigger tune it's not getting enough fuel at full throttle. The studdering before it shifts is BY FAR the most common symptom of needing a fuel filter.
Get it changed and I bet she'll run like a dream!
We've got an awesome deal on wix/napa fuel filters as well. 2 filters shipped to your door for about $60. Let me know if I can help
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