XJR The Oddest Noise - Driving Me Nuts! -FIXED
#1
XJR The Oddest Noise - Driving Me Nuts! -FIXED
Hello! I'm hoping that someone has the answer for me or perhaps an idea. There is a noise the mechanics cant find it because they don't have the the time to drive the car.
2004 XJR 90,000KM (56,000mi)
About the noise:
-Only when the car is in motion
-Doesn't change/modulate with REVs or Speed
-Sounds like a plastic bag is being dragged out side or a deep low hiss
-Seems to start once the car has reached temperature
-Sounds a bit like Morse code if you were to do it with a plastic bag out the window.
-It is NOT wind noise and sounds like it is on the left side of the engine/exhaust.
-I can't tell if it is the back or the front
-Doesn't go away when the car is shifted into Neutral
-Doesn't changed when you break ... only when you stop.
-Doesn't do it when parked or if the car is still even if you are Revving the engine.
I'm at my whits end! It sounds like a loud and intermittent and doesn't respond to speed or revs.
Any ideas? Exhaust? Belts/Bearings?
Thanks!!!
2004 XJR 90,000KM (56,000mi)
About the noise:
-Only when the car is in motion
-Doesn't change/modulate with REVs or Speed
-Sounds like a plastic bag is being dragged out side or a deep low hiss
-Seems to start once the car has reached temperature
-Sounds a bit like Morse code if you were to do it with a plastic bag out the window.
-It is NOT wind noise and sounds like it is on the left side of the engine/exhaust.
-I can't tell if it is the back or the front
-Doesn't go away when the car is shifted into Neutral
-Doesn't changed when you break ... only when you stop.
-Doesn't do it when parked or if the car is still even if you are Revving the engine.
I'm at my whits end! It sounds like a loud and intermittent and doesn't respond to speed or revs.
Any ideas? Exhaust? Belts/Bearings?
Thanks!!!
#5
Mine have some of the noise when stepping on the brake while in motion and the car seems to vent some pressure air out and it's coming out from the left side of the front too. It sounds like blow off valve from turbo car. It's not the pump that makes the sound but it's some form of pressure relief from the air shock or something I guess.
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DanielCR (11-22-2011)
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#11
You can get a vacuum leak in this area even without brakes being applied. Start the engine, open the hood, remove master cylinder compartment cover and get your ear down close. Worth a try says I.
quote=DanielCR;432055]Thanks for the breaks idea. I'm confident it isn't the breaks because the noise is there even if the breaks are depressed. I thought it could be the park break caliper but it doesn't seem to be.[/quote]
quote=DanielCR;432055]Thanks for the breaks idea. I'm confident it isn't the breaks because the noise is there even if the breaks are depressed. I thought it could be the park break caliper but it doesn't seem to be.[/quote]
#12
If the caliper is loose and rubbing the disk, the brakes will still work but the caliper body will continue to rub the disk and make the noise until both bolts fall out! Then it will be a new experience as it rides forward until the hose breaks and it falls off!
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