Stumbling and Grumbling

[MarkMullins]

Hello everyone. I don't converse much on here but I sure do a lot of reading especially when I am looking for help. I have a 2001 2500 CTD with 202K miles. Stock motor except running a Superchips programmer set to highest mode or hotrod, I can't even remember what's its called its been in there so long. running a FASS Platinum with Donaldson filter. Stock 47RE but it has a throttle cylinder from BD. VP44 replaced with Bosch Reman at 201888 miles (9-30-2020). Has ran perfectly until this past week. I was running highway speed out to a friend's place when the truck started grumbling and missing kinda like it was running out of fuel. Once I arrived the truck sat for about 4 hours while we cut up caribou meat. I decided to risk the 40 mile drive home and one of the guys said he would come rescue me if I broke down. Not one single miss on the way home. Next day I replaced the filters thinking I may have gotten bad fuel since I had filled up at a different store than normal. Ran it again after the filter change and it ran fine, no grumbling. Yesterday I was leaving for Napa to get a front axle actuator and the truck was running so badly I couldn't go so I idled back down the street to home. Today I checked for codes and found P0216 and P0602. The 216 is supposed to be for injection timing failure and is said can be caused by fuel flow issues. I tested the APPS with analog voltmeter today and it tested good. Can anyone take a crack at this? could I have shelled the 44 by starving it with dirty fuel or plugged filters??

 

[NIsaacs]

Can you disconnect the programmer and try it?

 

[MarkMullins]

After tinkering all day with this truck and testing different things, I found the ground connection for the FASS harness had corroded enough to disconnect. With the engine running and vibrations and bumps it was causing the pump to cycle all over the place and pop 216 codes and generally run like crap. I haven't ran it many miles like this, nor put much of a load on the engine while running what little it has, my question at this point is how much if any damage has been done to the VP-44?? I read that the 44 has a little pump inside and I assume it was able to run at least somewhat using that? Is this true? I didn't even get to the programmer yet because of the other testing I was doing but now it is running fine after the ground repair. Not sure if I even need to bother with the programmer.

 

[DavidC]

If it is running fine leave it alone. Good find on the wire.

 

[MarkMullins]

Much appreciated, thanks!