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2003 5.9 cummins bogs at idle

1281 Views 8 Replies 2 Participants Last post by  Ureczky, 
Ureczky
Hi everyone I got a very hard situation I can't figure out but first I want to tell you everything that is done I own a 2003 dodge cummins 5.9 6 speed manual the motor was just rebuilt about 10,000k ago it has 60hp bd injectors and a fass fuel system with a superb turbo and all brand new when I put the motor in and am running a bully dog triple pup for a chip ok now that I think is close to everything.
So now when my truck is at a idle it seems like it bogs then ticks like ifi was starting in a high gear at a dead stop (the rpms do not move when it does this) but only does it for about 2 seconds then it goes back to normal but it contuesly does it so I did plug it in and at a shop and the fuel rail pressure drops off wen it happens then spikes right back up so I'm really wondering what the hell is going on please help me
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K
Id try replacing the FCA.
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K
Correct. Unplug it and try it for about a min watching psi. Shouldnt surge or bog. It will knock like an old vp pump 24v though. Dont attempt to drive or rev with the fca unplugged.
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K
Sounds like an FCA problem to me still. How many miles on the rig? If its starting and running fine otherwise just a little idle flucuation and lope id try FCA.
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