When starting I can drive it about 10 miles all seems fine, runs good. Other times I start it runs fine until I get the destination, put it in Park I hear a miss, or Loping. I then shut it off wait a couple of minutes then start it, It runs fine after that, It only seems to come and go, Its does not do it all the time just every once in a while. Seems like a hit and miss.
I have a 2003 that I have taken in to a reptile Salt Lake Repair shop. No codes; they said it was a ground, but every once in a while it still happens.
I am thinking about taking it in to another Repair shop, any thoughts what it might be ?

Puzzled
Chris

 

Could be a chafed wire.

When I had this happen it was an injector starting to fail, keep your eye out on oil level and your nose out for oil/diesel fuel odors.

 

I took my truck into CIS Diesel Replaced my MPROP, all is good.

 

What is that? How did they know that was the problem part?

 

MPROP=FCA

Fuel Control Actuator on the back side of CP3 pump.

 

Yep. One of the symptoms of the FCA acting up is a loping idle.

 

I just ordered a FCA to see if that would cure my little lope/rough run at idle.

 

And.......?

 

didnt make any difference. I also put a new southbend clutch and flywheel in, that smoothed it up a little better, guess I just have one thats not a smooth runner.