I know my original post was long but I have unplugged the OS and truck runs almost perfect (other than a couple of surges right as trans is shifting and only under hard acceleration) I am not sure what's normal behavior running without a OS
I disconnected the fuel line into IP and put in a bucket and ran lift pump until all air from fuel filter was gone. I also have a clear line installed between the filter and IP to monitor any air and its solid fuel no air bubbles. What are the odds of getting a "NEW" injection pump with a bad...
Thanks for the reply I set the alignment pin at 12 o’clock position when old IP pump removed and went in with new one. Also the old IP had a scribe mark new one did not so I carefully transferred the scribe mark on bolt flange. My scan tool will not show timing info. Will out of fine tune timing...
I have just installed a new injection pump on a 97 Yukon ("New" model for low sulfur fuel from Heath’s Diesel) also replaced all injectors (From Heath) replaced oil pressure switch under manifold wile in there. Replaced fuel filter and confirmed lift pump working correctly as well as bled all...