Throttle Body Adjustment Screw
Throttle Body Adjustment Screw
Like a few others I have read on this forum, I touched my throttle body adjustment screw. I know you aren't supposed to do this (now), but I did, and I need this to be right. Please, If anyone can offer any suggestions on how to adjust it, it would be very helpful. Thanx!
-
IowaSilvia_S13
- Posts: 189
- Joined: Sun Apr 13, 2003 7:41 am
- Car: HMM... IMPORTS IMPORTS IMPORTS
hey. just loosen up the nut (8mm i think) on the set screw. Then get a small mm allen wrench and adjust it. You have to get in there from the bottom side by the fan side. If i remember right. Don't do this while the car is running though. If you do, whatch your hands and don't get them or your tools caught in the fan. Just adjust it a little at a time. good luck
well you are pretty much right. you do have to adjust while you also do your timimng and idle settings. There was one thing i noticed. Using an ohmeter is best. When you remove the screw all the way, the resistance is around 1 ohm. As you rotate the tb, the resistance drops to about 0.6 and then goes back up to 5 as you rotate the throttle plate. If you set the screw far enought out that the resistance is dropping and then going back up, it really screws up the comp. What I did was adjust the screw so that the resistance curve was at the very bottom (0.6) so that as you turn the tb, the resistance only goes up and does not dip back down at the beginning of the rotation. Then adjust the car accordingly for timing and idle. After you are done, you can very slowly and gently rotate the tb to see if it is working right. the critical part is the fully closed adjustment. The stock settings for the tb resistance are 0.7 closed to 5 open. No more jumpy feeling in the thottle.