Archived Running rough, throwing codes

[Elite1]

My water pump went out last week, sprayed quite a bit of coolant all over the engine compartment.

Took it to a Cummins dealership. They did the following work:

replaced water pump, pulley idler, serpentine belt. While it was in, I had them adjust the valves.

The truck is an 03', HO 305/555, 6 speed, with 109 k miles. They steam cleaned the engine to clean up the coolant mess...

While I was driving home from the shop, got about 5 miles down the road and the truck started bucking and surging. The shop was closed for the night, so I nursed it home, another 5 miles or so.

The next morning I called the shop and told them of the problems, they said to bring it back in...

Instead I decided to try drying out all of the electronic connections with a blow dryer. I was assuming between the coolant flying around and the steam cleaning, water may be the problem.

I dried out as many as I could and started the truck, it seemed to be back to normal. drove about 20 miles and it seemed fine.

Now a day later it has started bucking and surging again. Sometimes the fuel surges all the way to redline, then I push in clutch and it comes back down. Tried drying all connnections out again and even spraying contact cleaner. It didn't help.

Here are the codes it has thrown:

P0111, P0201, P0107, P0642, P0483, P2146. I have already looked up all the codes...

Does anyone have any suggestions ?

 

[Alan Reagan]

Try checking your ground connections under the hood. Not sure where they are on your model, but the pressure cleaning may have caused the ground resistance to increase enough to give you a problem.



Make sure you check and use a cleaner/lubricant on the connector pins. Corrossion resistance on the power pins will cause big problems, too.



The ground connections would be my first look.

 

[Elite1]

OK, After a lot of head scratching, going through every connection I could find and drying and spraying. I think I found the problem. I checked all ground connections. But it was still acting up. Disconnected the Volumizer box, that wasn't it either.

Cleared codes and came up with P0483 & P0642.

After doing a bunch of searches on this site of other members having similar problems and the same codes, I found an old post by "Lone Wolf", he had the same surging problems and the same codes. Here:

https://www.turbodieselregister.com...-me-can-t-safely-drive-truck-codes-p0642.html



He finally determined it was a short in the fan. I now have disconnected the connection below the radiator, which goes to the middle of the fan. The truck runs fine, with it disconnected. So at least I now know the source of the problem! Which is a relief... but it took a lot of hours trouble shooting and grief!