if i let my 1999 dodge 3500 diesel sit over night it wont start inless i hold the key for about 20 seconds then when it does start it runs rough for about 2 seconds then smoths out and drives just fine i have checked for fuel leaks none found that i can see had a new starter and batteries put in by cummins 2 weeks ago problem started about a week ago new fuel filter installed and oil change done my lift pump is a fass ddrp i get 21psi at idel when it starts and only drops to 16psi at wot not sure what it could be no error codes i hope my injection pump is not going when truck starts the smoke i see out the tail pipe is a little blue