I have 2002 duramax LB7 about three weeks ago it was sitting idling and CP3 INJECTOR pump blowed a freeze plug out. I changed injector pump put it all back together ran fine started good for about a week . Then it started cranking over for a long time before it would start. It starts fine when its cold but after you drive it is hard to start . It has banks six gun tuner exhaust,intercooler and air intake on it. The service engine light dosen't come on but on the PDA it shows P1093 & P1094. I changed filters twice cant see any fuel leaks but primer does go down after starting. 137000 miles

 

Any solutions? thanks