Ok the last couple weeks my truck has been running rougher and rougher on start up and missing out while driving. Also although it started rough...it would still start up good; but after you drove it and got the engine warmed up it won't start. So i took it to a diesel mechanic and he said my isp valve needed replaced and the clamps on my turbo went bad causing an exhaust leak. He also put it on the scanner and it showed all electrical systems were fine. I had him test my coolant pressure and that showed fine. So he thought it was fixed... Well I drove it to rural king and tried to start it and wouldn't start and had to tow it home...