86td wont respond to throttle until i press it half-way

[libbydiesel]

...check to make sure the nut on the accelerator shaft is tight before changing your fuel filter...  Checking to make sure it's tight is free, immediate, does not open the fuel system potentially causing new issues, etc...  If the nut is loose, then messing with the fuel filter would be a waste of time. If the nut is tight, then changing the fuel filter might not be a bad idea.  I'd be reluctant to say that is most likely the problem.  The clogged fuel filters I've dealt with did not cause the symptoms he describes. 

[sean_caton666]

so i tightened the nut on top of the springs, and lawd lawd it worked. now i have a question, how do i make sure the nut stays tight?

Also Thank you everyone that helped

[libbydiesel]

If the nut is tightened to a typical M6 spec of 7.5 ft-lbs (90 inch-lbs) it won't come loose on its own. 

Do you feel that the performance is the same as it was previously?  Is the top accelerator lever piece oriented correctly on the piece below it so that the nub on the lower piece is in the hole in the top piece?