Car Sounds

A4's have no blowoff valve. VW's and Audi's use a completely different setup.

the engine is using its power to run the power steering pump

Nails scratching on a blackboard are an unpleasant sound. Nattering may be another unpleasant sound.

it's the air intake taking more air and the belts moving faster

Loose Lug nuts bad control arm...

I bet it is nothing mechanical. Try shifting down a gear and see if it stops. Sounds like detenation with the fuel. I had a Toyota that done the same, I thought it was suspension, but no...

It is definitely fuel detonation!! Just about all rangers do this, You could try going up to 89 octane,but with prices these days!!! Try that lucas fuel injector cleaner (in the skinny bottle) that should help. A octane booster will probably help too. try a K and N air filter cold air intake its expensive but it does make a power difference and helps with the pinging problem. Ford says it doesn't hurt the motor!!!

It is so simple.The pressure of the loud noise will enter your ears.Your mouth should be opened the pressure will exit out the Eustachian tube.

It's very common and is usually caused by the "fan belt" (water pump belt) being overtight, especially in cold weather before the engine has warmed up properly. It just needs the tension readjusting... a two-minute job for a competent mechanic.

the a/c pump could be loose.check to see if the bolts are tight.

a mechanic heard a rattling under my 95 and said it was a small hole in my muffler pipe and it will get bigger if i dont weld it but someone else said the pipe was loose and knocking on the clamp

50k ago, I had to remove the heat shields from the catalytic converters. Took care of it!

Quite a variety of possibilities. Maybe a loose heat sheild, or a serious engine problem. Post what you find after you visit a local independent repair shop.

NO.

Could be a worn belt, failing power steering pump or low power steering fluid.

Yes, if the nuts are loose. If so, replace them with new ones as these are not reusable nuts.

A front right wheel can grind for a number of reasons. Brake pads when worn to metal can cause this. Also C/v axles that have shredded boots, worn wheel bearings.

start by checking the brakes, replace as necessary

My MX6 was just doing this on the way home. If I stepped on the gas, braked, or turned it would stop. The frequency of the knocking noise would increase with the speed, but seemed louder the slower I was going. The brakes were just done last week. Anyway, in my case the wheel lug nuts were loose, I could just unscrew them by hand! I will be calling the garage tomorrow to let them know.

the cause of this is probably a bad u joint

sounds are similar because if two different sounds are pointed in the same direction, in the same location, at the same thing then the sound waves of the sound will travel in the same path depending on the volume(loudness) of the sound. Sounds are also similar as all sounds need a medium to travel across. Air, water, and any solid are examples of mediums. In space there is no air. This is why in space you wouldn't be able to hear without those radios. Luke Iannone

possibly your wheel bearing is on its way out

you should check the belts. Sounds like one is a little loose and slipping. or the system may be over-charged

You may have burned it up. AC compressors need oil initially.

Usually the compressors require additional lubrication during the installation. The warranty on compressors usually require the replacement of the dryer (Accumulator), orfice tube, and flushing the system. This will eliminate debrie and contaminates from damaged compressor in which was replaced. The compressor may be checked for the grinding noise by the following procedure. Disconnect the battery ground. Remove drive belt from clutch. Place wrench on nut in center of clutch and rotate slowly clockwise. If the shaft doesn't rotate smoothly there is likely damage inside the compressor cylinders and pistons. If the compressor checks OK, check other components while the drive belt is disconnected. For example, The pulley on the alternator, idler pulley, and water pump should not have any end play. The AC compressor puts a heavier load on the drive belt and may cause other components to make noise. The only other possibility that comes to mind is that the compressor clutch bearing is bad or the clutch is slipping. ! Good luck!

This question is about a 97 Pontiac Transport Van.

knock sensor is going bad or is bad

if its a low knocking noise it is normal on the 3.1 engine!! if it is loud check to make sure the valves are getting oil!! I have a 2000 Malibu v6 and it is the same way.

Check the lug nuts immediately. Check tha clip that holds the brake pad on. I had a loose pad that made more of a tick sound that went away when I pressed on the brakes