VAM modification

[SVO-SMITTY]

Have any of you guys changed the settings inside the VAM? I have a friend of mine with a turbocoupe and he told me that he opened up the black lid on top of the VAM and lossened up the screw that holds down the contack patch and adjusted the contact patch so that it moves further to the left. He also said some other stuff that I cannot remember, but he said that this mod adds more fuel. Does this sound familiar to anyone, or is my friend talking sh_t? Thanks.

[SVO-SMITTY]

I talked to my friend again and he told me about a web site that had the following information: I was just wondering if anyone has ever tried this and if it is worth it. I don't know if I will try this or not. Any info on this let me know.


NATO and it's members take NO responsibility for the outcome of this modification!

1988 Thunderbird Turbo Coupe VAF mod - Mike's VAF modification for more fuel intake. 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.

[daffeyduck77]

i have changed the settings inside the VAM?it was a pain it made things worse i finely had to put a a/f gadge to set the vam i do not recomand ajusting the vam unless you have a/f gadge do step 10 Start the car.Rotate the black "gear" untill you are at 14.7 on the a/f gadge