Skip the auto shop - Our mechanics make house calls

Q: car cutting out in low gears on stopping, traffic lights and junctions

asked by on

ive had the idle valve and pipes replaces, oil & filters changed/cleaned, new spark plugs, new front brakes, anti roll drop bar replaced but the car keeps cutting out when I slow down and press the clutch and brake together, also the battery light flashes on every now and again whilst im driving it but the battery is also brand new.

A: Hello. This is often times a sign of a fail...

Hello. This is often times a sign of a failing mass air flow sensor. As you may know, this is a unit that monitors the air flow into the intake as it is mixed with the fuel prior to being injected into the motor. It relays this info to the car’s computer which then tells the fuel injection system how much more or less fuel to introduce to the motor. When this is faulty, this will cause inaccurate fuel trim adjustments to be made resulting in the car cutting out as you describe. I would recommend having an expert from Your Mechanic come to your home to diagnose the stalling problem and replace the mass airflow sensor if verified faulty.

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!

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: Power window not working

The window regulator and motor are the most likely causes of the window not going down. If you hear the motor running, but the window does not move, then the regulator is broken. If you do not hear the motor,...

Q: my suzuki. Forenza. smokes two colors

Hello. Most of the time when the smoke is blue it is because it is burning oil. If the smoke only occurs when the engine is first started it is typically from the valve stem seals. If it continues to...

Q: Tappet noise oud, rough idle 2009 Ford Focus

Hi there - the valve mechanism on your Zetec engine uses solid lifters (or cam followers to be more precise), and need to be adjusted periodically. As you mention, the delayed maintenance may not be helping here as well. I...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...