I have a 89 nissan in great shape...It wasn't running so hot all the time though, and i found that I had a loose connection to my air flow meter.........my timing is off a little too on the distribator....any suggestions on how to time it correctly by ear.........also was wondering what the idle switch does on the back of the throttle body........because my electrical connections are a little bad there also.........I also would like to know how much of a difference headers make in the performance of the motor......and if there is any cheap modifications i should make....i gotta 3.0 v6, automatic 4wd........thank you all and look forward to learning and talking more .....i will be posting pics right of the bat......