Hi All

So my car has suddenly decided to run a little rich. Was a fine a day or 2 ago.

What used to the numbers

Full deceleration > 20 AFR
Idle/cruise 16-17
Accelerating 13-14
WOT 11

Now

Full deceleration > 20 AFR
Idle/cruise 14-15
light Acceleration 12
WOT 9

Defiantly seems to be consuming more fuel too.
It never had a O2 sensor since I have owned the car. Do all vr4s have a O2 sensor?.