Make sure it's set up like this: in the etc. menu:

From RRE:
1. Sensor Type

Choose number 4, "Karman" This being set incorrectly is the number one cause of trouble with AFCs not working properly on initial set up. You have a Karman type air flow meter, you need to select Karman.

2. Car Select

Cyl. "4" Thr. Arrow points Up

3. GRPH Scale

Cr: move the Correction viewing limit up to 30 % (maximum)

4. Sensor Check

Allows you to trouble shoot problems with wiring. You should see the top and bottom values changing as you free rev the motor. Also can be used to read O2 sensor voltage.

5. VFD Bright

Lets you set the display brightness, the factory settings are fine

6. Initialize

Choose "No" It really should be called Reset. It will take all the
Set Up settings back to the factory settings.