Skip the auto shop - Our mechanics make house calls

Q: Audi A4 engine not running smooth

asked by on

Hi, my engine is running rough, I used a fuel injector cleaner and got better gas mileage, but engine ran the same. Changed the fuel and the engine ran better, but still not as good as I want it to run. My engine also is burning oil, should I change the spark plugs or check the ignition coils? No check engine or other codes in the dash.

A: The first thing would be to check the throt...

The first thing would be to check the throttle body to see if it is really black from oil? If it is then you may have leaking oil seals in the turbo causing you to burn oil. This may also make your engine run rough without causing the engine misfire codes. Check your plugs and replace them if they are worn, black or have oil fouling from burning oil. If you still have issues then the coils may need to be replaced since they are common to get weak and cause rough running without a total misfire. If you still need help diagnosing why your engine is running rough have a certified mechanic, like one from YourMechanic, come help you out.

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: Did my clutch go out and if so is it the slave cylinder or release bearing?

The problem may be the slave cylinder or the clutch master cylinder. Check to see if the fluid is full. If it is, then the master would need to be checked to see if it can produce pressure or not...

Q: Speed sensor passive

Hello. If the speed sensor is passive, as in it is not responding then there is likely some sort of issue with the speed sensor or circuit. Common causes are issues with the speed sensor, circuit, or even the computer....

Q: Accelerating from red light, car jerks; also at 25-35 mph

Hello there. Many different faults can cause the vehicle to jerk and have acceleration issue. The most likely cause of these are spark plugs, battery, alternator, fuel pump, low transmission fluid, MAF sensor, vacuum leak, exhaust leak or oxygen sensor....

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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 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.