Q: Q: Car jerking

asked by on

i installed a cold air intake and drilled a hole in the pipe for my maf sensor and now my car jerks when i shift gears. have any idea whats wrong?

The hole drilled into your MAF sensor has altered the metered reading of air being injected into your car. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information to the ECM which uses this to make adjustments to fuel supply to the motor. The excess air that is now being supplied to the motor is causing 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 type of inconsistent fuel supply to the motor may cause a hesitation, loss of power, a jerking reaction, potentially a bit of black exhaust smoke and typically a strong smell of fuel when this sensor is malfunctioning. Often times when making modifications to the intake, an aftermarket MAF sensor is required in order to compensate for the change in air as the factory sensor will not always re-calibrate. I would suggest having a professional from Your Mechanic come to your home to diagnose and inspect your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Car jerking

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: My car is C180 AMG. My car jerks but when i unplug the airflow meter sensor it drives normal, its a new airflow meter.

Hello there, many different faults can cause the MAF sensor on your 1999 C180 to cause the car to run poorly. If the MAF sensor was replaced and the problem still remains than the most likely faults are a vacuum...

Q: Loss of power and misfiring in 2000 BMW 323CI

The first thing you want to check is on the driver's side, the intake manifold and all the plastic there is between the radiator and the engine. You may barely even see them without a flashlight and a little mirror....

Q: Q: Slow acceleration

Thanks for writing in about the acceleration issue with your 2007 Volvo S60. At first glance, I'd agree with you that the problem would be caused by the MAF sensor, as that's what commonly causes the slow acceleration issues and...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...