Hello, I am hearing a sound that resembles a jet engine .I can't tell where it's coming from.Sounds like maybe the top end around the throttle bodyor under but I may be wrong.Its extremely HOT today(air temp)all gauges are fine,all fluids are fine and the truck was serviced on Mon. PVC line was replaced.I've been going through a spat of bad luck so I'm assuming the worst and hoping for the best.I'm sorry if my discription is slightly less than vague but it's all I got right now...what do you think? Mark
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If it sounds like a jet taking off then it's most likely some rush of air so where/how does air under pressure come from? Well, it comes from your exhaust but you said that's been replaced. Could be a cylinder head gasket in a engine but you would have felt a lose of power if that was the problem.
Is it a bearing that just sounds like an air sound? As I've suggested with other people...have someone follow you, then pull up along side of you on both sides and see if they can hear/isolate where the sound is coming from.
Sometimes when you're driving it's hard to hear exactly where the sound is coming from because well....you're driving!
So having two people in another car riding along side of you on the highway or unpopulated back road can hear it better.
Just remember to do it safely...you are on the road after all but if you hear it at 40...you should be able to hear it loud and clear at 55 or 65 or whatever the speed limit is.
Going too slow on the highway is dangerous too so obey the speed limits.
There is really no way to know what the noise is, you must have it inspected and well you have it in the shop have the engine control computer scanned for fault codes, when the CEL is on the system will set a fault code for the problem that turned on the Check Eng. Light.
if you feel the pulsation in brake pedal when stopping. its a warped brake rotor thats causing it. for bad cv joint symtoms--- Unusual noises when making turns. As you are driving on the road and you make a turn at the corner, if you start hearing unusual sounds coming from under the car then this is one of the symptoms of a bad CV joint. These noises will sound like something is clicking beneath the car every time you turn the steering wheel. Evidence of a damaged boot. Steering wheel feels heavier. The steering wheel will start to feel tighter and heavier and you can hardly make simple turns to the left or right. In severe cases you might even feel heavy vibrations like you are driving down a rocky road.
Mate.Before you let ANYONE pull the engine apart,get the timing checked.I am only going on your description but it sound like the motor is "knocking".It means the timing is wrong and is a cheap fix.Hope this helps
Most likely cause is a hydralic tappet. Mits are well know for top end noise. Note we are talking about a tapping or clicking sound not a knock. You can try using an engine flush product if the noise is getting bad and then changing your oil. Generally if the oil is not changed regularily eventually the tapping noise gets happens.
Hi. if your timeing belt has not been changed that would be the noise it will make. you should get done right away because if that belt breaks you motor will need a new top end. I hear them all the time when the belt is getting to go and the way you explained it. It sounds like you need one today. It will cost you about 500. hope i was a help to you and good luck. P.S. change that belt every 60,000 miles.