I have a 95 1 ton with a 6.5. I keep getting dtc 36 ant it randomly statrs bucking really bad going down the road. The pmd id on the intake and is about 3 months old. Ip just rplaced, ops is new, lift pump is new, fuel filter new. No air in the fuel, no vaccume in tank, starts pretty good, cleaned the screen in the filter bowl. No other codes. ANY ideas?

 

What type of ops? And when this happened to me I did the ops rewire

 

It was an ops from napa. I ran a fuel pressure guage into the cab and the pressure did not change when it was acting up

 

One of my ground wire terminals on the back of block broke off but still had intermitant contact with block. drove me nuts, well at least indicated I'm nuts, but, thats another thread. My other problem was that several oil sending units went bad and wouldn't alway fire up lift pump. Does your lift pump run for a few seconds after shut off?

 

I have checked and cleaned all my grounds. I also have a temporary fuel guage on it and the pressure does not drop when it is bucking. I do not get the dtc code while it is buckig either

 

OPS relay install - Diesel Place : Chevrolet and GMC Diesel Truck Forums

OPS REWIRE

 

I think i found the problem. Took the filter out of the harness for the os which fixed the bucking problem. Also hooked a scan tool to it and found the wastegate sol. was working but not correctly and that took care of my dtc 36.

Thanks for the help!!

 

nice to hear you figured it out