Combines 8010 power trouble

Sounds like your sucking air. Possible pump problems

had same problem yrs ago my engine was shot

Was yours using oilIJ This one doesn't use any and has no strange sounds or anything that would make you think the motor was NFG.

First time i 've been told i was sucking air and not blowing hot air!!! ROFl. If there was a leak would it not leak fuel when the motor was not demanding muchIJ It is a stanadyne pump with 4100 hours on it.

Same thing happened with my 7580. I changed both air filters and the problem was solved.

sounds like not enough fuel getting to the engine. pump is probably weak

connect a clean supply of fuel via flex fuel hose and run it straight to the pump back inlet, not using any existing tractor fuel supply. I bet it runs fine now - if your pump will crank the tractor currently. 95+% of the time if a pump will crank the tractor and not run away the pump is OK. A fuel restriction results in timing retardation. Retarding the timing results in unburnt fuel - black smoke. Cranking cold and hot is the hardest job the pump has to do. It also indicates adaquate transfer pump pressure. A quick check to see if you have around 6psi at cranking and 80 or so at WOT confirms pump transfer pressure. Placing a timing window on the pump and revving it up should also show timing advance indicating advance mechanics are ok. Before replacing turbos do the 4 point check 1 is it leaking oil into the inlet, 2 is it leaking oil into the exhaust and 3 is the turbine shaft locked up and 4 can you wiggle the input turbine wheel enough to get the impeller or turbine to hit the side walls - if the answer is no the turbo is almost never a major problem.

We once had a pipe plug come out of the intake manifold on an l2 Gleaner. Turbo couldn't pressurize manifold and it would smoke like crazy and bog down.

correct, I forgot this, had it happen several times, cannot figure out how after a thousand hours they could come out. Most on combines.

On my 8010 with Roosa pump, it also has electric lift pump. The electric pump has failed twice so far (3900 hours) for me and both times it reacted like you describe. Try tapping on the electic pump housing when it is loosing power and see if the pump re-starts and your power problem goes away. I had this pump fail again just this fall - would be fine bouncing around the field for hours on end, but put tractor in park for 3 minutes and it would starve of fuel and shut down. Must be a problem inside the lift pump as putting a new pump on has always cured it for me.