Question about 2012 Mazda 3 i Touring 4dr Hatchback 2.0L 4-cyl. 6-speed Manual w/SKYACTIV-G

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Engine noise and rpms going down

Having issues with my 2012 mazda 3. When the car accelerates the engine makes a rattling sound and the rpms suddenly drop. If I take my foot off the gas the noise goes away and it doesn't happen all the time but it seems like it's occurring more frequently. Also really only happens at lower speeds (between 10 and 30).

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Does the engine light come on during this failure? If it does, please have the codes read and forward them back to me. From your symptoms, it sounds like a mechanical failure. I would inspect the TAC (throttle actuating control) valve. and the throttle pedal, to start? You can look at it physically, inspect the wiring, condition, and operation. If you can get a friend to help. remove the air inlet tube, look at the butterfly inside the TAC unit. Have your friend turn the ignition key to run (DO NOT START THE ENGINE) and watch the butterfly respond as he or she applies and releases the throttle pedal(request to your helper, to communicate how far the pedal is going down and coming back). The motion of the pedal and the butterfly should be smooth and consistent. Would you tell me how often these symptoms occur and does it happen when the engine is cold, hot, or any temperature. Write back with any additional information or questions, good luck.

Posted on Mar 22, 2014

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Posted on Jan 02, 2017

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eitan
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SOURCE: Engine Making Noise when accelerating

Could be carbon build-up on the pistons, causing erratic flame travel in the combustion chamber... 'pinging'...... Decarbon the engine and use a high grade fuel for a few tanks.... also an octane booster can help

Posted on May 15, 2008

1HOTPRO
  • 1 Answer

SOURCE: Rattleing noise between 2500-3500 rpms 01 protege

Just took my car to the shop for the same appearent reason me also thinking it may be lifters. My mechanic said it spounds like a worn wrist pin ...... bad news for you if this is the case .......recomendations rebuild the engine or buy a new or remanufactured one. if the wrist pin lets go then you could throw a rod. If you must drive the car please be gentle

Posted on Jul 13, 2009

  • 743 Answers

SOURCE: The rpm fluctuates at idle

It could be several things...low fuel pressure, a lazy 0 2 sensor, and even an IAC. If there isn't any service engine lights coming on, you will need a qualified tech to do the test since a lazy 0 2 sensor has to be looked at with some type of a volts meter and a scanner has the capability of doing a better job yet since you wouldn't have to get underneath the vehicle. Don't be fooled into thinking that it is just one thing; it could be several depending on the mileage.

Posted on Oct 03, 2009

  • 1 Answer

SOURCE: mazda cx7 engine noise

just get rid of this car, because you are going to need a new engine soon, my 2007 mazda cx7 with only 33000 miles is at the dealer for engine replacement!!!! only 2 days after i purchased the car

Posted on Mar 19, 2010

  • 2 Answers

SOURCE: I have a 2003 Mazda MPV , the problem only happen

I ahve same issue with my 2004 MPV. I replaced the plugs, coils etc. No help.

did you ever get it fixed?

Posted on Mar 24, 2010

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My question: what can cause the car to do this?


I assume the car you are talking about is your 1968 Dodge Dart GTS with a 4-speed manual transmission. The engine has a special camshaft, Chrysler P/N 312044, which has a 60 degree overlap in the valve timing, since the engine is built to rev in excess of 6,000 RPM. The problem with your car is obviously a leaky accelerator pump. Why don't you get a car that (1) does not have to run on premium gas (because of its 10.5:1 compression ratio), and (2) uses fuel injectors instead of a wild 4 barrel carburetor made for 1/4 mile drag racing? I happen to know that that is the car you are referring to, because you did NOT say that it WASN'T!

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HAS A RAE SOUND WHEN I ACCELERATE


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My pontiac g5 will make a noise when i accelerate


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Mazda 323 bj not exccelerating


ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION


It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

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Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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These details will help.

Thanks.

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Clicking in the engine


here are few components that can cause such problem.Its advisable to click the link below and follow the troubleshooting to correct the problem.
Engine makes noise? http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html

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Chirping sound coming from engine? http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
--------- Vehicle making Clunk Thump Thud noise? http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html

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Car Engine Overhaul Tips? http://vwrepairhelp.blogspot.com/2011/11/car-engine-overhaul-tips.html

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HOW TO PERFORM A BASIC ENGINE TUNE UP-OIL CHANGE
http://schematicsdiagram.blogspot.com/2011/08/how-to-perform-basic-engine-tune-up-oil.html


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Rattle noise from engine? http://whatisbyme.blogspot.in/2012/05/2005-toyota-corolla-rattle-noise-from.html

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These will help.
Thanks.

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1 Answer

Noise sounds like a metallic chirp from valve train.


To narrow it down, while the engine is running, don't get near moving parts, you can use a long piece of steel, metal, put 1 end on the valve cover, the other to your ear and listen for rattling. You can move it around to narrow down the source of the noise. It's like a stethoscope but works well. I use a 3' long screwdriver.

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