So I got a dizzy off somebody froms craigslist....put it out it ran perfect...ran good for 2 days...i went to go out to lunch on my break and the check engine light comes on it starts backfiring occasionally and bogs down..I took it back to work hooked up a scanner and pulled the check engine code...it was for the map sensor...idk if the timings off and the misfiring fucked up the map sensor or what I loosened the dizzy and turned it a little bit and cleared the code and 1/2 way home it did the same thing....anybody know something I dont that could help?