why did my engine stall when I unplugged the MAF sensor
I unplugged the mass air flow sensor on my 2014 Scion Tc (30,000 miles) and the engine stopped immediately. From what I know normally the engine should not stop. I unplugged it to check its operation because the idle is a bit low and unstable. All the rest of the mechanics is in perfect condition. Yesterday the mechanic checked with his scan and found no errors. Ideas why the engine stop?
I unplugged the mass air flow sensor (...) and the engine stopped immediately
You are lucky you didn't fry the ECU!
because the idle is a bit low and unstable
- Start the car (Do not drive during the process)
- Warm up the engine
- Turn off head lights and turn off AC
- Shift To N with parking brake engaged
- Rev to a bit over 4K RPM for a bit over 45 seconds with a stable and constant pedal pressure
Does It idle correctly now?
I tried with the engine off. I unplugged the Mass Air Flow Sensor then started the engine. It works. The ECU is probably a little slow before compensating for the disconnect. I will test with another Mass Air Flow Sensor for bad idle.