If you do not have a good understanding of how the air meter in your Turbo Coupe works,
perform steps 1 through 5, start the car, open the throttle and observe what happens.
The problem with the VAF is that is doesn't send the maximum amount of voltage to the
computer that it is capable of when the throttle is wide open. At full opening of the air door,
the contact wiper may be as much as 3/16" from the end of the contact area. The VAF works
like a potentiometer - the farther the wiper goes, the more fuel enrichment reaches the
engine.
Mike says this modification fixes this deficiency with no adverse side effects.
1. Remove the air cleaner assembly and the four 10mm bolts that hold the bracket to the body.
2. Remove the three 11mm nuts that hold the bracket to the VAF sensor.
3. Disconnect the wiring and the air hose.
4. Carefully remove the black cover from the VAF meter. It is glued on. Work you way around it
carefully. You CAN get it off without destroying it.
5. Put the meter back in the car connecting only the air hose and the wiring. Don't put the bracket
or air filter back in yet - just lay the meter in the car near where it mounts.
6. Start the car and make a mark on the white area to mark where the wiper is when the car is
idling.
7. Shut off the engine.
8. Remove the VAF meter.
9. Push the air door open as far as it will go and note how much more travel the wiper can have
without going off the contact area.
10. Loosen the Phillips screw on the top of the wiper while holding the air door open. Move the
wiper to the end of the contact area. Don't go off it.
11. Re-install the meter as in step 5.
12. Start the car.
13. Rotate the black "gear" around the spring clockwise until the wiper points at the mark you made
in step 6. This ensures that the engine will receive the same amount of fuel at idle and part throttle as
it did before the wiper was moved.
You may have to tighten or loosen the spring a bit to get rid of any bogging/ Only trial and
error will produce the optimum setting for YOUR car.
The mod is done! I take no responsibility for this procedure or the contents of this page.
Performance can be gained using this procedure, but if you mess up your car doing it, I'm not
liable. Any questions on this procedure should be directed to Mike at ZIPPY2300@AOL.COM
