2000 cummins Truck was working fine tell high pressure washed the engine after that the truck starts but it wont accelerate it idles rough. what could that be its on CL and it looks decent other then the issue.

 

Water in connections at the APPS would be the first place I would look. Any codes?

 

not that i know of i haven't talked to the owner yet i just thought id ask here first before i talked to him to see if it would be worth it to get.

 

I think its always worth it to have a code reader handy. It can make diagnosing much easier. I'd still look at the APPS connector to see if there is water in it, or if a wire came loose.

 

ok what is that and where is it?

 

It is the Accelerator Pedal Position Sensor, and it is under a black cover located at the front left corner of the engine right on top. Underneath it is a 6 pin connector, have a look at it and its wires. It would also be a good idea to remove the black cover and make sure there is no water under there. Also check your fuses under the hood, they are on the left fender.