I don't think I have any slipping issues. I've since gotten the car started and runs fine, just has no power... or it's been so long since I've driven it that I've forgotten how weak these little motors are. The no start issue was actually bad glow plugs. Not sure how they went bad just sitting there, but things happen! I still can't figure out why I can't adjust the pump any higher than .40. Everything else seems normal... I can run it and coughs black smoke when I get into the pedal or high RPM, I just can't help but think it's lacking power because I'm unable to adjust the pump further than .40