I've got a check engine light that has popped on twice. First time I swung out to pass a semi, pretty heavy on the throttle going from 65 to 75. Half way out the truck seemed to almost shut down, and the check engine light popped on. Pulled over, shut it down, checked everything I could, started back up, and its driving fine. I'm pulling 7,000 pounds give or take, and was in tow haul mode with the DSP5 on the 70hp tune. Not getting hot, good oil pressure, everything seems in check. It went off after 15 min. of driving, and turned back on 50 miles or so later while going down a hill with the turbo holding the truck back in tow/haul. Immediately went off as soon as I gave it throttle. Any ideas. I'm gonna find an Autozone in the morning and have it scanned, but until then whats your guys thoughts? Also, some pictures of drive shaft u-joint surgery in the middle of BFE New Mexico. The retaining clip broke, and was clicking in the yoke, driving me nuts.







