Medium and Heavy Trucks
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Hi Wes, My name is***** will be glad to try to help. What is the complete engine Make, Model and serial number and any fault codes you are getting if any?
Thanks for the update. dummy plugs and leaking o rings are usually the cause of this. Be sure that there are no leaks in the high pressure rail. Try pressure testing with shop air to confirm no leaks engine hot at the ICP sensor port. Do an injector test to see if you might have any bad injectors, Verify fuel and ICP pressure is within specs cranking, Verify compression in all cylinders for any low compression. Try disconnecting the ICP sensor when this occurs the see if it will allow starting. Let me know