I've read about these symptoms and 100 things could be the culprit. Albeit, I've had good luck getting my truck fixed when I get suggestions here. So here it goes 2000 6.5 Engine starts right up, no smoke. Idles very high. Idles so rough it broke a motor mount. Can't maintain any rpm with accelerator, sometimes when I push the accelerator it runs away. Has 130k, factory replaced ip around 90k. I had 2 problems shortly before this started. First the crank pulley failed gave it a vibration and broke the PMD relocation cable. Replaced both ran 1000-2000 miles,engine rpm became increasingly unmanageable. When the PMD cable connection went bad I could hear the ip solenoid shifting rapidly when I would touch the connection. So solenoid may have been damaged with all the shifting on and off or from the pulley vibration. I replaced the PMD with two known good ones. I haven't put a code reader on yet. Its leaking power steering fluid from the booster, its been leaking for a while so the drivers side under dash is soaked. I've since purchased a new truck, but if its a simple fix I may keep it. I also had batterie problems just before this problem started. I didn't want to spend any money as I knew I was buying a new truck. Ffm filter is black. When I put the old filter back on I missed the rubber o ring, started it, ran smooth but fuel was leaking all over the place. Fixed the o ring restarted problem persisted. What say yee??