I've just returned from Iraq, and have time to work on the truck. For the past 2 years, I've had a problem with hard starts (only when hot), surging, and occasional stalling. Lately, my fiancee' has been complaining of it stalling while sitting in traffic...otherwise, the truck runs GREAT!!! I couldn't fix because I was in Iraq. Before I got home, I ordered a new PMD, and have since put it on (remote mounted between the grill and custom brushguard.) I still have the problem with surging, and have ran the codes...I've got DTC 35 and 36...is this a problem with the injectors, or is it more likely the pump is quitting on me?? I bought the truck 2 years ago with 180,000 miles...it's now reading about 220,000. I know there's someone on this site who's got more experience in the matter. You have all been helpful in the past, and I'm sure you will be now. THANK YOU ALL IN ADVANCE.