OK fellow diagnostitians Got a newi sender low end stumble with my 1990 JDM swaped tt Checked and ruled out vac leak CAS temp sender coil packs plugs O2 sensors Injectors are too new to be suspect Now the question. Recently to pass emissions I replaced the orig fuel fill cap Back when I did my swap I had to take out the carbon canister to accomodate the Appolo FMIC I dont remember if I capped the lines but I did plug the plenum vac. Could the new (non leaky)cap plus the lack of proper canister hose plugging be a factor in the new problem