Skip the auto shop - Our mechanics make house calls

Q: My car is not starting when the MAF sensor is plugged in - 1991 Nissan Serena

asked by on

It is not revving properties

My car has an automatic transmission.

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel.

This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason. In your case, when unplugging the mass air flow sensor, your car’s engine is bypassing the mass air flow sensor input into the ECU causing it not to have a reference point for air/fuel mixture. This may momentarily start the car, but it will not run correctly or rev up normally as you have experienced.

I would suggest having a professional, such as one from YourMechanic, come to your home to diagnose and replace the mass air flow sensor.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • My car is not starting when the MAF sensor is plugged in - 1991 Nissan Serena

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Won't start

A number of faults can occur when an engine overheats. If the engine was overheated severely, it is possible that the engine has internal damage and has seized. Also, engine electronics are very sensitive to heat and liquids. If coolant...

Q: i have all power but no crank

Hi there. It is more than likely that the main electrical relay has been damaged somehow. This could happen due to an exposed wire or faulty ground wire, or debris within the contacts of the electrical relay. It's also possible...

Q: I have a 02 chevy trailblazer I went to step on the gas pedal and all it did was revved up but no go I pulled over and it died I t

This may be caused by many things such as low fuel pressure, a bad mass air flow sensor or a faulty idle air control valve. Low fuel pressure can cause an engine to starve for fuel due to irregular fuel...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...