Q: Knocking sound when driving. Disasters when braking or accelerating.

asked by on

When I drive I hear a knocking sound that gets more frequent the faster I go. The knocking only appears when I cruise, if I'm braking or accelerating the sound disappears. Been under the car today and I've noticed my heat shield is slightly loose and close to my exhaust. Could it be hitting the exausht as I drive??

My car has 60000 miles.
My car has a manual transmission.

If the knocking only appears when you are at cruise and becomes more frequent as you go faster, then you may have an axle inner joint or a transmission mount or engine mount issue. This may be why the noise goes away when decelerating or braking. See if the noise comes and goes if you cruise and let off gas and get back into the gas to see if noise comes and goes. If it does, then try and see with a passenger’s help to see if you can isolate where the noise is coming from. For example, is it the left or right side? This will help to explain the noise to the mechanic when they come and pinpoint the cause of the noise.

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. Knocking sound when driving. Disasters when braking or accelerating.

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: I was driving down the road and lost power. Stepped on the gas and the car wouldn't accelerate, but didn't rev up either. Got back home on idle.

Sounds as if the throttle pedal position sensor is not responding when stepping on the gas pedal. Try turning on the ignition key to the 'ON' position with the engine off and step on the gas pedal to the floor....

Q: I get a squeaky noise when I turn right or come to a stop.

The first thing that comes to mind would be lower ball joints. It's not uncommon for ball joints, tie rod ends and brakes to exhibit similar sounding squeaks, although lower ball joints are the most common culprit for squeaking when...

Q: Car is not starting and new battery didn't work

Hello. It sounds like the battery fuse may have blown out. The battery fuse is a high amp fuse that can range from 80-amps to 120-amps, and is bolted to the fuse box. It also sounds like there may be...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...