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resident mason
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Anyone else have a surge when their truck is cold, around 160. Mine feels like it's bucking/ surging bad sometimes. It did it even without a tune. The fuel filter is only a month old and it's a Napa (Wix). I can't figure if it's the turbo, the programing, or bad fuel.
 

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if the ambient temp. is below 32 degrees the tranny will hold a longer shift pattern to help warm the engine which warms the cab quicker.
 

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BUG JUICER and
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firehillbilly said:
Anyone else have a surge when their truck is cold, around 160. Mine feels like it's bucking/ surging bad sometimes. It did it even without a tune. The fuel filter is only a month old and it's a Napa (Wix). I can't figure if it's the turbo, the programing, or bad fuel.
programming likely will fix it.
 

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take this into consideration, the fuel is a lot thicker when cold and sometimes the fuel pressure regulator has a hard time keeping steady pressure
 
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