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Old 07-19-2016, 04:39 PM   #1
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Performance problems

I have a 2013 that is falling on its nose when you floor it but let off about half way and it takes off hard. I've put a flowmaster cat back system on and a set of shorty headers and K&N cold air on with edge programmer. Any ideas why

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Old 07-19-2016, 06:36 PM   #2
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How many miles in the truck? Is there an engine light on?

Few possible issues here clogged catt not to likely. Fuel issue either pressure or trims are way off for some reason. (Yes a trim issue can take a Hemi truck out it can also cause a TB shut down). A tps issue could be at fault also bit should throw a code.
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Old 07-19-2016, 07:58 PM   #3
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Performance problems

No lights on at all and it has 58890 miles
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Old 07-19-2016, 08:14 PM   #4
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I'll check fuel pressure and change filter to make sure for a start
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Old 07-19-2016, 08:26 PM   #5
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Old 07-19-2016, 08:29 PM   #6
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Old 07-19-2016, 10:41 PM   #7
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What there is of a filter is located in the gas tank. IMO, not likely a problem. If it ran ok before the mods, then it will be something to do with the mods. Shorty headers and cat back exhaust are easy enough, but the tuner could be messing you up. How about remove the tuner and do a pcm reset to see what happens.
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Old 07-20-2016, 03:00 AM   #8
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Old 07-20-2016, 04:41 AM   #9
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I have taken the tune off and reset it to factory setting. The only change was less power.
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Old 07-20-2016, 04:58 AM   #10
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Have you re-calibrated the throttle (foot feed pedal)?

Turn your key to the on position, but do not start the truck. Wait til all the idiot lights settle down in the dash, then slowly push down on the throttle pedal to the floor, then slowly let up on the pedal. Turn the key to the off position.

http://www.hemitruckclub.com/forums/...p-16651-2.html
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