Q: Engine surging on 2008 audi a4 Quattro

asked by on

Hello, I have a 2008 audi a4 Quattro and my issue with the car right now is engine surging. The problem is bad when engine is cold but the problem persists even after the vehicle is at optimum running temperature. I have brand new spark plugs and coils, changed oil, new fuel filter. Not sure what the problem could be at this point but it is annoying as I can't figure out what it might be. Definitelt not the transmission as I have gotten that checked out recently. Feeling a vibration everytime the RPM drops and goes back up while driving. Another issue I'm having is when I have my vehicle in Sport mode, I hear and loud growling type sound around 2500 rpm on every gear, not sure if it's a driveshaft issue or something else. Turbo is brand new and I can hear the sound when in park and reviews he engine also.

My car has 112,213miles.
My car has an automatic transmission.

Hi There, What you are describing is a common problem with a dirty or faulty mass air flow sensor. 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. A dirty or faulty sensor 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 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. I would suggest having a professional from Your Mechanic come to your home to diagnose your mass air flow sensor.

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. Engine surging on 2008 audi a4 Quattro

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: Engine skip - 2008 Mazda Tribute

Hello there, I would need more details about the problem in order to help you with engine skipping on your 2008 Mazda Tribute. If the engine timing is off, it may skip and there is many possible causes for the...

Q: How many map sensors are in my 2011 Sonata 2.0t?

Hello. There is only one MAP sensor on your vehicle. If you replaced it and the code has not gone away, or you are still experiencing the same symptoms, there is likely something else going on with the circuit. Make...

Q: Q: Car overheated and then shut down

Hello. Though there are many places that coolant can leak on this vehicle. The most common cause of a fast leak is a failing water pump or a crack in the radiator. I have also seen a lot of coolant...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.