King Gamabunta-x7

Hey guys so slowly I'm learning. I searched but couldn't find a thread to solve my proven but a lot of info on how to adjust things. Well except for the idle still can't figure that out just right.
Ok my Problem is that there is a small misfires ever so revolutions i need.to get rid of. I checked.timing its a lil advance frim the yellow mark. Then as the engine misses(hickups) it retards just enough to line up with the.yellow mark then.jumps out of.place again. same bullcrap with T1 instead of.staying on the red it actually jumps from red to yellow back to.red. So crazy
This has gotten long so to end, is this normal behavior. 90 na. No real mods besides exhaust. (cat) abd downpipe(came with car looks rusty I'll check cause it does sound like a leak from that area)
Also how tight should the accelerated cable be?