I'm new to the forum, and need some help from folks that know. My son has a 2001 Ram 2500 that started giving him problems recently. It would start, but not respond to throttle input, only surge like you were tapping and releasing the throttle, then other times it would start and run normally. He took it to a local diesel performance shop, and they told him the Injector pump and lift pump were bad, and charged him $2500 to replace the pumps. Now after this is done, they are telling him the truck runs, but dies when it gets hot. They are saying that the ECM is bad and needs to be replaced at a cost of an additional $1500 plus labor. The truck never did this before they worked on it, and I personally think that they did something to the ECM while the repairs were being made. Is it likely that this could happen?