Shitty cummins idle

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Uploaded by on Jan 9, 2012

Please help diagnose this if you can.

has done this since day one when bought stock, with 240k

Now has 280k and never got worse or changed.

truck now has cpp 150 injectors,
Industirl injection SO vp44

fass 150

new cam sensor and crank sensor

edge with level 6

truck made 400 hp 900 ft lbs

Just this shitty idle is driving me crazy!!!

basically the entire fuel system is new...BAD ECM??? valve seat cracked??

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  • Do have a fuel leak on high pressure side line or you could have the line nuts too tight on the head causing an internal leak might be pulling in some air but starts pretty good for that maybe your fuel return is restricted or tank vent plugged this will cause the truck to run rough doesn't sound electronic but never no on the vp one other thing is to make sure your valve lash is right and rockers are torqued right 27lb ft I think

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