6.2 Revving and Missing

Thanks for the input guys. I'm talking with Scott over at Oregon Fuel Injection as it seems people have had good results there. The pump that is on there is a
While I'm buttoning up under the valve covers I'm debating about using the steel washer retainer modification for the stamped rocker arms rather than rolling the dice on the nylon bushings. I found a set of cast rockers on a 6.2 at the junkyard, but the oiling issue is pretty evident on the shafts which have deep grooves worn into them like my cast setup.

Injection pump is the only thing it can be. Not sure what it is from afar but I would say a fresh injection pump rebuilt by a competent shop is in order. I am sure that sounds really sweet with the EGR holes open and running with no intake. You have an injection pump issue for sure. Unless the throttle cable is stuck. unhook the throttle cable and make sure the throttle returns to idle position. Or take the cover off and look inside. the cover will slide to the back with the 3 bolts removed. Slide it towards the front when reinstalling in and you should be good. The injection pump is a precision piece and jacking with adjustments throws the precision piece to the scrap pile. Do as you wish. I never had any issues with a Diesel care rebuild for $350. and had trouble with 2 brand new ones that I bought as out dated. Go figure. Have a Great Day. Put the intake back on after you get the rebuilt pump.

Popped the top off the pump....this its what was in there....pretty sure the weight retainer shouldn't spin independently of the main shaft and have so much slop. I'd say she's toast.

https://youtu.be/028iCfToxbk