cmont58
Yankee
- Joined
- Apr 27, 2010
- Messages
- 1,071
Ok I have an 01 lb7 with a zf6 in it. When I'm pulling a long grade especially with a trailer it will fall on its face when you get around 20 psi of boost, let off the throttle and coast a bit and it will come back and run normal most times but sometimes it's still a dog. My question is could it be the waste gate opening and the springs to weak to close it or could it be something else. The truck has 340,000 miles on it and is starting to show signs that it needs injectors again but it fires right up and runs great just heavy haze when started or sitting at a stop light. I currently do not have a way to check codes or monitor anything but any help is appreciated.