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Bad Flutter, surge after CP3 Mod

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Old 06-13-2007, 10:03 PM
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Bad Flutter, surge after CP3 Mod
After CP3 Mod, my truck has a bad surge. Quick surge not like turbo surge. I used a scan tool to check rail pressure, rail pressure jumps up and down from 21000 to 18000. This only happens at a little more then half throttle. Wide open runs make you crap your pants. Any ideas?
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Old 06-13-2007, 10:11 PM
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Make sure your FCA is completely deburred. If it isn't, it will surge.
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Old 06-13-2007, 10:48 PM
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I sanded all edges with 1500. Works great until mide to hard throttle?
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Old 06-13-2007, 10:58 PM
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Try resetting the APPS. That has fixed more than a couple with similar problems.
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Old 06-13-2007, 11:04 PM
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Ok i'm a dork whats the APPS?
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Old 06-13-2007, 11:15 PM
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This thread has the steps to do it...

https://www.dieseltruckresource.com/...resetting+apps
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Old 06-14-2007, 05:12 AM
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did you check the bore that the valve goes in for any burrs,when reassembling did the valve slide in and travel the full length very smoothly.
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Old 06-14-2007, 12:01 PM
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When I finished the valve went back and forth with out a problem. Smooth as silk. I made sure to check that.
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Old 06-14-2007, 07:06 PM
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I had the same problem and it went away after I installed the edge ez I assume it is fooling rail preassure as it does the boost sensor
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Old 06-15-2007, 11:14 AM
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Is there any other way to fool the fuel rail pressure (smarty)?
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Old 06-15-2007, 04:30 PM
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The new beta version smarty does play w a lil pressure.

Bob
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