If you do have a n issue with engine running dont be tempted to let your uncle harry have a go at fixing it.
Or anybody else for that matter unless they havea lot of ex
Typical view of a hot wire air flow meter waveform.
Using an oscilloscope can give a thumbs up or a thumbs down
The fuel filter in an injection is very important make sure yours is replaced regularly,some garages will fob you off
All to easy to jump on the bandwagon and blame a sensor where the fault could more than likely lay in a connection or a bad piece wire somewhere in the system
If you run your car on petrol fumes then you will encounter a problem unique to injection systems
We always get the customer to road test their car to tell us if the fault as gone.
You dont drive a car you wear it
This is so open to misdiagnosis commonly a new oxygen sensor is fitted not good
Your Engine will gradually deteriorate in terms of power and running quality over the miles or years.
As drivers we tend to adapt to changes by in most cases pressing the pedal harder to overtake,or when there is extra weight in the car ie passengers.
Developing faults or say a misfire wont always cause the engine light to light