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I have a 99 dodge cummins with 85,000 miles has hypertech programmer and bully dog 5 inch exhaustI recently replaced fuel filter when realized the lift pump wasnt pumping, replaced itThe problem is when the truck is cold it cranks goes into gear fine drives fineafter truck warms up it will cut off while idling in gear doesnt start back as good a normaltruck does not show any codes thanks for ANY help

Hi everybody. I am new here, and I have an interesting problem. Thanks in advance. 2000 5.9, 5sp, 4x4. 210,000mi. New injector pump from Midwest EFI, new Air Dog 100 lift pump. Otherwise stock. After sitting for a few days, it will take 5-10 sec crank time to start, but once it starts it runs normally. Tech is steady and normal. Not much smoke except at RPM near redline. When the truck is warm, if you let it idle, it will miss slightly. Power sucks over 2000 rpm, but isn't bad overall. Throws PO234 overboost code, but I feel that is due to the fact that I left my Edge boost elbow on the turbo. Edge juice CTS won't connect to the ECM, Dodge says that the Cummins Insite computer won't connect to the ECM. However, the truck still runs, and not that badly. The truck has had an edge juice w attitude installed previously, and I may have shorted out something in the ECM when I uninstalled the previous Juice. I also get 13-15mpg. The Dodge mechanic feels that I got some grit in the injector lines when I installed the pump, and fowled a couple injectors, then over the course of a couple days the fuel system is bleeding down. He also says that since his Cummins laptop won't connect to the ECM, I need a new ECM. He did use a scope to confirm the timing marks and the keyway on the pump is correctly installed. I need to check the fuel pressure coming out of the Air Dog, to ensure that it isn't too high... How high is too high? (I used to use an edge attitude to monitor the pressure) Any ideas guys? I am skeptical about the injectors theory, since I would expect it to smoke a lot more at 13mpg. Would the injector O rings or fuel bypass at the back of the head cause any of these symptoms? And I really want to make sure the truck is going to run decently before I drop $1,600 on a new ECM...