Hey guys my 1999 F350 dually just started acting up today. About 2-3 days ago i notice a slight rough idle and when you stood near the 5in canon you could kinda hear a loopy idle. Well today as i was driving i notice when the truck shifted into overdrive the truck would shutter (like a lock up issues)! I though great my converter is on its way out, well about 4-5miles down the road it started to shutter in every gear and notice when i stoped and let the truck idle it would run really rough like a misfire. When you stomped on the go pedal with the DP tuner you could really see a miss in the black smoke.LOL i know it sounds funny but the black smoke used to be continous when stomping on it but now it's like it smokes a bit then nothing, then smokes again,etc. I had issues like this with my 1994.5 PSD and it was a melted inj harness under the valve cover, so i pulled the valve covers on my truck and everything looked good. So anyway no check engine light but i check it out with my snap-on scan tool and came up with a P1298 IDM fault. So what do you guys think a bad IDM module? I dont have a break out box to check Ohm's,etc on the IDM module, but my buddy that his family owns a local ford dealer is going to check his stock to see if he has one in stock.
The DP chip dosn't set this P1298 code right? its another code it set's normaly right. So iam really thinking its the IDM module, what do you guys think?