Issues earlier CM870

[Hgilp]

Truck has been demandated, but not tuned yet. Haven’t looked into who to have tune yet. I’d also like recommendations on that, if anyone could give any input. I did buy the plate to check the injectors, and a dial indicator to check the timing actuators. I don’t want to put a lot of money into this engine. It already has almost 1.2 million miles on it, and I don’t plan to inframe it. I was quoted $24,000 at the low end for an inframe, and don’t trust any smaller local shops. They won’t even diagnose the issues I’m having now. I just can’t afford to run a truck getting 4.78mpg. Thanks for all the replies. I’ll update once I do more diagnosing.

I’ve never seen the VGT actuator move. I moved it by hand and it knocked rust off the turbo, I know that isn’t a good sign. Does the actuator hold the canes normally open, or normally closed? I know if it was normally closed, I’d always be making boost, and won’t get any fuel mileage.