Truck has performed perfectly for 19,000 miles until last Friday. I was on the freeway in stop-and-go traffic when I noticed some hesitation and stumbling. It got worse, then the truck just died. I pulled over, waited a moment, then restarted. After a long crank it fired right up and drove fine.

I changed the fuel filter after that (it had about 7,000 miles on it) and also checked the airbox and intercooler hoses just to make sure nothing was wrong with those. Everything checked out fine.

This afternoon, I did a full-throttle run to 60 MPH and the truck stumbled in the 2500 RPM range.

Any ideas on what may be happening? There are no codes.

 

Any white smoke on start up? Mines been doing some of the same things and it looks to be an injector problem.

 

Have you checked the possible wire chaffing issue for the high pressure A/C switch. Look at above stickied thread.

 

lift pump goin south...

 

Haven't been paying attention. I'll keep an eye out.

I checked that as best I could - didn't see any problems, but then again I couldn't load the pic so I may have been looking in the wrong place.

I thought the CP3 could pull through a dead lift pump. The in-tank ones are flow-through, yea?

 

Mine won't with the retrofit kit on...

Andy