i recently converted my '93 "L" to mass air among other things......my timing jumps and isnt steady...i set it at 14BTC and it will go up to like 18 then down to ten and it keeps movin aroudn when i have the light on it....anyone have this problem when they converted to mass air....or anyone have this problem otherwise????

 

first all make sure your cap and rotor are all tight.. second did that mass air converation make any different in your truck performance...???????

 

ihad t oconvert to mass air bc of all of the mods i did and everything in my distributor cap is tight and working