Having problems my trucks starts bucking under load. Checked injectors thought one might be stuck. All ok. Still having same problem. No codes.

 

Have your supply pressure to the injection pump checked ASAP, more than likely a bad lift pump, pressure should be a minimum of 7 psi, if it is you need to repace your lift pump or your injection pump will become ruined VERY quickly.

 

is your tach going to zero while its bucking ? could be cam or crank sensor.

 

I have a raptor 150 it is set at 15psi never goes below 7psi even at wot. Tach never varies more than 50-100 RPM.

 

what is your rpm when it bucks?