I seem to have lost some get up and go in the ol' tracker. when it idles every now and then it will miss. it will do the same thing if you hold thr throttle around 2000 rpms. the 400 code keeps coming up and i've done everything i can think of to clean it. taken off the tube, the valve and jammed a coat hanger in places i didn't even know existed!
I also have a bad 02 sensor (after cat) or where the cat should be...... does anybody think one problem leads to the other? also...will the 02 sensors work correctly without the cat? I have checked my timing several times and its all good. a few months ago i had the broken crank key blues and fixed it. it ran AWESOME after that but seemed to have slowy lost some power. i have even taken out the #1 plug to make sure the piston is in the correct posision in aspect to timing marks and distributor positions. any help, hints or tricks would be appreciated thanks, GEO JOE