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Thank you I checked back on my post and found your suggestion. I accually already took it to dyno-mite diesel and they think it is the check valve on the return line. I'll know tomorrow. Scott

Thanks for the answer, Im in Seattle and its at Cummins Northwest. They say they have gone thru their diagnosis tree and are down to the Pump. I have had the transfer pump replaced in Yakima 2 weeks ago, because it was cutting out on a hill pulling a trailor. When I got back I pulled the tank to...

I took my 94 in for hard starting(you have to push the prime pump to make it start then everything is ok. After $550 in diagonsis fees they say it needs a new injection pump. Why does it run ok after pushing the prime on the transfer pump but the problem is as serious as an injection Pump?

Thanks for your responce. Scott

looking for a mechanic to diagnose and repair an fuel air leak in a 12v

I had a problem with the engine shakeing and losing power on a long hill in Yakama. Cummins checked everything and adjusted the waste gate and timeing. Then decided the lift pump was bad. My home to Seattle was slow and it shook and tried to cut out once on a long hill and the engine was real...

I had a problem with the engine shaking and losing power on a long hill in Yakima. Cummins checked everything and adjusted the waste gate and timing. Then decided the lift pump was bad. My home to Seattle was slow and it shook and tried to cut out once on a long hill and the engine was real...

I had the same problem in a 94. I found that the water in fuel detector was damaged. Try opening the bleeder valve and push the prime button a couple of times. I my case I noticed fuel leaking out of the bottom (only when the bleeder valve was open). I believe that under heavy demand this could...