I have a 80300sd and adjusted the rack damper pin wrong....I went too far in with it and it caused the injection pump to stay there. I can't get it to adjust back. The engine now stalls and increases idle speed on it's own. I think I really blew it. Does anyone know if there is a way to get it back to run correctly. Did I ruin the inj. pump? Any input would be greatly appreciated.

Welcome to the forum.


When you say "I can't get it to adjust back", can you please elaborate?

Normally, the locknut is loosened and the screw is simply backed out a touch.

well I read that the new style rack damper is suppose to be a little longer so I got this crazy idea to grind down the lock nut a little (about 1/16 inch) so the pin could go in a little further to help the motor to not idle so hard. Well I tightened down the pin bolt and I guess it pushed up against something in there and caused it to stay that way, because when I back the pin bolt out it doesn't make any difference.

What happens if you start over.

Remove the bolt completely.

What does the engine do at idle?

I backed the pin almost completely out and it still does the same. I think I caused something to get jammed in the i.p.

With the engine shut off, open and close the rack a few times (with your right foot on the pedal).

See if this will reposition the rack.

I don't think you caused any permanent problem.