My truck stalled on me this morning while leaving the driveway. It had normal throttle response until I let off the throttle at the street, then when I pressed the pedal again, no response. It was still idleing. Then a "service throttle soon" came up on the dash. I replaced and relocated the PMD a couple of years ago and have had no problems with rough running and stalling since then, but I have noticed over the past couple of months that the throttle response "hesitates" occasionally (maybe once or twice a week. Any help would be greatly appreciated.