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My step dad has an 02 dully 2x4. I dont think it even has 100k on it yet. He took it to a local diesel shop and they said its the IP and said its going to cost 2700 out the door. It runs starts and idles fine. Its when you hit the hwy only every now and then it will loose speed without you letting out of it. You have to down shift to jump up the RPMS and then you can hit the next gear then its fine. I thought if an injector pump goes it doesnt show much sign it just goes his truck has been doing this for months and he has drove it daily since. What do yall think it is i am scepitcal on the pump going out just doesnt sound right sounds like someone is trying to screw him. I could be totally wrong and if i am tell me. My pupm went out on my old idi 7.3 and it just went with no signs. If it is the pump who has a good price on it and where and how hard is the install i did the one on my old 7.3 idi with no problem the hardest part was priming the sob. What do yall think