Damn!!! mmm...diesel, ya beat me to it!! I too have experienced the same issues (been fighting these issues for too long), rough idle, engine "lope", timing rattle, poor mileage, down hill and cruise control surges and having to "re-download" programs/patches numerous times to get this thing to work ...

I bought a Dr Performance "predator" fuel/boost module a ways back, I have just recently purchased the Diablo programmer. Can the Dr performance predator be stacked with the Diablo programmer?

The issue I was having was at first start up the engine ran very smooth but, after a cruise up and down the highway with RV in tow I pulled into a strip mall and parked the truck idle was very rough. I got it reprogramed with the r27 pulled trailer out to folks place ambient temp was 95deg and ...

Most likely has the r28update as I purchased programer today and the diesel performance shop checked for and downloaded latest upgrades. So, now I gotta make a run to puter shop to get me a cable for downloading ...

I just picked up the U7130 and raced home to install the "Economy Performance" setting hooked on to the RV (small 6000lbs) and went for a spin... I'm impressed!! Question is I pulled into a strip mall had the truck in park and noticed a fairly rough idle!? I gave the go pedal a quick kick only to ...