No Improvement in Performance After MAF Clean
Cleaning the mass air flow (MAF) sensor is just a maintenance type of repair, just like changing the oil of the engine in your Ford vehicle is only a maintenance type of service.
To be a bit more specific, if the engine in your Ford vehicle is knocking... changing the engine oil (no matter how old or dirty), is not gonna' solve the engine mechanical issue (that's causing the knock), and so it goes with cleaning the MAF sensor.
Cleaning a MAF sensor will only improve engine performance and/or gas mileage if it's dirty (contaminated). So, if cleaning the MAF sensor didn't do anything for the vehicle you're driving.. you need to look into a deeper mass air flow sensor diagnostic (to see if the MAF sensor is bad).
The mass air flow (MAF) sensor on your Ford 2.0L, 2.5L, 3.0L, 4.0L, 4.6L, 5.0L, or 5.8L equipped vehicle is a component that's pretty easy to test and you don't have to replace it just to see if it's bad (or not).
To be a bit more specific, it can be tested with just a multimeter (no scan tool required) and in 4 easy test steps.
So, If you need to test the MAF sensor itself, to see if it's producing a correct signal the PCM can use, check out my article on testing it with a multimeter at:
- How To Test The Ford MAF Sensor (this article at: easyautodiagnostics.com).