Skip the auto shop - Our mechanics make house calls

Q: Hi Melvin My car is jerking even after replacing petrol filter and spark plugs what else could be wrong?

asked by on

Hi Melvin My car is jerking even after replacing petrol filter and spark plugs what else could be wrong? Would it be the air filter or oil filter?

My car has 90000 miles.
My car has a manual transmission.

A: This may be a sign of a dirty or failing ma...

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 results in an over fueling or under fueling situation depending on the conditions. This may cause a hesitation, loss of power or jerking reaction when this sensor is malfunctioning. When this is not working properly, you may also notice a strong smell of fuel. I would suggest having a professional from Your Mechanic come to your home to diagnose your 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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: AC compressor not working

AC systems have pressure switches that must be applied for power to go to the compressor clutch and turn it on. I would be willing to bet that your system has a leak that needs to be repaired before it's...

Q: How does a smog test work?

How a smog test works depends on where you live. If you live in the United States different states have different requirements and some parts of states may have as well. Usually the more densely populated areas require more stringent...

Q: Transmission does not give out much power while accelerating.

It sounds like you may have a misfire. What are the codes that you are getting? It could be caused by ignition components or a faulty sensor like the mass air flow or throttle position sensor. Reading the codes should...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...