jupton
Horsepower lover
- Joined
- Aug 19, 2009
- Messages
- 245
Hey guys im working on this truck for a buddy of mine. 94 5spd 400k on it. Problem is at about 1800 rpm it starts to pop and backfire and wont rev past 2000 at all. Ive checked the timing its still at factory setting. Replaced all six injectors with another set that i know are good. Lift pump pressure sits at 20 psi at idle and does not drop. Set the valve lash and checked out the top end, everything seemed fine there. The truck starts right up and idles fine. At this point im thinking it may be an issue with the injection pump? Any ideas would be much appreciated.
Thanks, Josh
Thanks, Josh