Skip the auto shop - Our mechanics make house calls

Q: Why is my car making a howling noise and blowing smoke when I accelerate? 2009 Mazda CX-7

asked by on

When I accelerate my car revs high but struggles. There is a continuous howling noise while accelerating but disappears as soon as the rev drops at about 70km/hr and each time I accelerate, there's whitish smoke from the exhaust that smells like burnt oil

My car has 141000 miles.
My car has an automatic transmission.

Hello - there may be multiple problems contributing to the smoke and noise symptoms you are experiencing. The exhaust smoke you notice could be worn or damaged turbocharger seals, or worn piston rings, allowing oil to reach the hot exhaust. The howling sound may indicate your transmission is not shifting up to higher gears as designed, due to speed sensor or throttle position sensor issues. I would recommend an engine/transmission inspection](https://www.yourmechanic.com/services/smoke-from-engine-or-exhaust-inspection) by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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!
  • Home
  • Questions
  • Why is my car making a howling noise and blowing smoke when I accelerate? 2009 Mazda CX-7

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: Check Engine Light and O2 sensor on a used car

Hi there. Assuming the vehicle Check Engine Light is an O2 sensor code does not necessarily mean the O2 sensor is at fault. It could be an electrical fault in the O2 sensor circuit(s). I highly recommend that you have...

Q: Beep/alarm no longer work on key fob

I can think of two possible causes of this issue. One could be that the security system on your vehicle uses a separate siren from that of the horn and this siren has gone bad. The second possible cause of...

Q: Steering rack problem. Not avaiiable in kenya.

Hi there. Unfortunately, this is not a question we are qualified to answer. Our certified mechanics offer OEM or certified aftermarket part replacement tips and suggestions. Although there might be a few other vehicles that if properly fabricated might fit...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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...