J James New member Sep 21, 2009 #2 With the newer vehicles. 90 and up most of that is done through the computer. If you do not have the diagnostic system and modules you can't do it. It is not like the old days when you used a timing gun.
With the newer vehicles. 90 and up most of that is done through the computer. If you do not have the diagnostic system and modules you can't do it. It is not like the old days when you used a timing gun.
