Q: After warm up I accelerate and it makes a rattling noise only when I'm pressing the accelerate

asked by on

I have a 99 mustang it makes a rattling , pinging noise when I accelerate only when the car is warm. I've put high octane in it and it still does it. I would like to know my problem and how I can fix it

My car has 85000 miles.
My car has a manual transmission.

Hello there, thank you for asking about your 1999 Ford Mustang. You may have a defective mass airflow sensor. The sensor may not set a code either. The problem is the sensor may tell the computer you are at 10,000 feet and the computer will compensate by leaning out the fuel mixture. This leaning out will cause the engine to ping. Have the mass air flow sensor tested and replaced if it is giving the wrong barometric readings. Also if you are using an oil type air filter it can contaminate the sensor. You should replace it with a dry type filter. If you would like help, a certified technician from YourMechanic can diagnose the rattling noise and replace your mass airflow 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. After warm up I accelerate and it makes a rattling noise only when I'm pressing the accelerate

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: Q: Button the shifter is stuck in

Hi Christian. Thanks for contacting us tonight. Typically this type of problem is caused by an inner spring on the shifter knob that is stuck or has been damaged. It's also possible that your brake switch is stuck or damaged...

Q: Truck accelerated past 35 and started sputtering

Hello there, thank you for asking about your car. The first thing that comes to mind is a secondary ignition misfire (spark plugs, wires, etc.). An ignition misfire is most noticeable under load and can be felt as a shudder...

Q: AC evaporator tank clogged

It is very possible that one of the AC drains are clogged. Blowing compressed air up through the drain tube may be enough to clear the clog. In the most extreme case the AC box can be removed and the...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...