it goes vroom....but sytill lopy....

A lot of those old girls need just a little sniff to get going in the morning. You might have to go aways on the low idle adjustment. Sounds like it is turning into a good deal for you. Maybe only parked because of the miss caused by the underwear?

could be some sticky rings from sitting. get her out and work it and some say put some additive in the fuel.

so...we got her started up this morning.....I turned the low idle....counterclockwise as mentioned befor...turned and turned.....no improvement....opened up the side plate on the injection pump..yea the rack moves slightly back and forth as shes loping...wound it up to "full throttle"..felt like half.....no were close to were the D4 revs up to...so adjusted that a bit.....played with it a little bit...seeing how well it dozed.....can carry a smooth pass better than the D4...(D4 has a C-frame with lots of slop)....until I blew a hose.....I think once I get the "loping" figured out...shes gonna be a execellent addition to the family lol

Hi,
you say you are screwing the LI screw but do not say if it is making any difference to the LI speed.
Sometimes with stiff linkages it can be difficult to distinguish when the operators lever has reached the LI stop position--it comes to a stop at a detent.
Usually takes a fair push on the lever to go past the detent stop and into the actual stop position--conversely some people have not pulled back hard enough on the lever to get into the fuel on position--not your issue here but, just saying.
Also it is not unknown to have the bell-crank lever in the middle of the D2 linkage reversed--note the position of the long and short levers in your parts book or service book pictures-- and so cause issues with actuating the Governor.

If the RPM is rising as you adjust the LI speed and you are not seeing an improvement until say somewhere above half engine speed, then it is most likely worn, flat spots on gov. rollers and divots in the thrust race face are the usual suspects for worn governor components causing the issue as CCJ said.

Cheers,
Eddie B.

Interesting Eddie. On my 5U, I can clearly feel the resistance to move the lever further to what I assume is the stop position, but if I bring the throttle down to rest on the "topside" of that resistance, the engine shuts down. I would have thought that that should be the low idle position. Under this condition, I could see inadvertent shutdowns happening all day. Does this mean my low idle needs to be adjusted upwards? Is it possible also that my timing is retarded giving such a symptom? When I installed the pumps, I set the lifter height with a caliper so it's pretty close.

Interesting Eddie. On my 5U, I can clearly feel the resistance to move the lever further to what I assume is the stop position, but if I bring the throttle down to rest on the "topside" of that resistance, the engine shuts down. I would have thought that that should be the low idle position. Under this condition, I could see inadvertent shutdowns happening all day. Does this mean my low idle needs to be adjusted upwards? Is it possible also that my timing is retarded giving such a symptom? When I installed the pumps, I set the lifter height with a caliper so it's pretty close.

Adjust the low idle speed to where it should be at that stop Neil. I just dealt with a 933 doing the same thing this winter. Made a totally different tractor out of it.

ON a Detroit diesel, if the racks have any resistance at all the governor will hunt at idle. Also again, slow timing can cause it to stumble at idle. Have you cracked each injector line when running slow to see if any any cylinder is not pulling its part of the load?