This Truck Is Gonna Drive me To Drink!!!!

[Red_Rattler]

First part of the stories here... . https://www.turbodieselregister.com/forums/truck-911-archive-members-only/207785-03-cummins-doa.html and https://www.turbodieselregister.com/forums/truck-911-archive-members-only/208237-03-dead-again.html I'm on my second aftermarket lift pump, first one didn't meet Mopar flow specs got a second one under warrenty from the first one. Now on the way home tonight truck stumble and then another big one that sounded like it softly "coughed" back through the turbo. With codes p00336 p0521 p0438 and finally p0628... ...

 

[TimothyLong]

Dude, that totally sucks!! #@$%! Sounds like you might have a control module going bad. Possibly an FCA or PCM.

 

[Red_Rattler]

Yea, I'm sick and ****** at the same time! Any help?

 

[TimothyLong]

Wish I could! The DTC's you listed point more toward a control module than a mechanical problem. This is just a guess on my part. Hopefully one of the gurus out there can get you pointed in the right direction.

 

[E7mack96]

Telling you man, try changing the FCA (Fuel control actuator)

 

[Red_Rattler]

Welllllllllll, I was poking and prodding under the hood 2day annnnnnnnd the whole time it was in high idle you could tell the rail pressure wasn't staying consistent. So I was wiggling wires on the back of the lift pump no change, onto the FCA wiggled made some weirder noises then smoothed out a weeee bit after I stopped. Then onto the rail pressure connection... ... Since my rp gauge and Banks is plugged into it thats like 6 points of failure As I'm moving and pushing it around smooths out roughens up so I said screw it and shut the truck off and say bye bye to the Banks connection. Start back up smooooooth idle no initial rp drop when I get on it. I think I might be on to something? Except now my rp is lower than it use to be but at least its steady now! I just don't know what a stock would have for rp since that what I'm basicly back to. I'm gonna run it like this for awhile and cross my fingers!