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I have a 200 Ford F250 7.3, I now have 125,000 miles on it, K&N cold air system, 4 inch straightpipe. The problem i am having is with the performance setting on my programmer. When i have the performance setting on and stand on it it sounds like the valves are floating and the HP is just not there? Any advise? I am only stating what it sounds like so i am hoping someone with more diesel experience can step in for me.
 

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superchip

Have you tried any other setting on the programmer. I have a dodge 2500 and some times you need to reprogram it and also try a different setting to see if it is doing the same thing. I have mine stacked with an edge ez and it is hell on wheels if I can keep the torque converter from slipping.
 

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archTech
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Your fuel pump may be going south...when you go to start the truck listen to see if the fuel pump is making any buzzing noise while you are waiting for the wait to start.
 
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