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Engine noise



 
 
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  #1  
Old May 6th 07, 08:46 AM posted to rec.autos.makers.chrysler
Moses[_2_]
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Posts: 20
Default Engine noise

This van I bought has a high pitched whine or whistle when driving
around town. It occurs when you step on the gas. The faster the engine
turns the more high pitch it becomes. When the foot comes off the gas
it becomes louder but lower pitched for a second or two. At idle the
noise isn't noticed and isn't heard at highway speeds. I'd like to know
whether it's a noisy alternator or a vacuum leak? I was assuming it was
the alternator but then it could be associated with the check engine
light that came on once recently, showing code 0121.
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  #2  
Old May 6th 07, 03:28 PM posted to rec.autos.makers.chrysler
Robert Reynolds
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Posts: 152
Default Engine noise

Moses wrote:
> This van I bought has a high pitched whine or whistle when driving
> around town. It occurs when you step on the gas. The faster the engine
> turns the more high pitch it becomes. When the foot comes off the gas
> it becomes louder but lower pitched for a second or two. At idle the
> noise isn't noticed and isn't heard at highway speeds. I'd like to know
> whether it's a noisy alternator or a vacuum leak? I was assuming it was
> the alternator but then it could be associated with the check engine
> light that came on once recently, showing code 0121.


The first thing I thought of was the alternator. I have an old Honda
that's starting to do that. I can't think of how a vacuum leak could
produce such a noise.
  #3  
Old May 7th 07, 02:18 AM posted to rec.autos.makers.chrysler
Joe[_3_]
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Posts: 298
Default Engine noise


"Moses" > wrote in message
...
> This van I bought has a high pitched whine or whistle when driving around
> town. It occurs when you step on the gas. The faster the engine turns
> the more high pitch it becomes. When the foot comes off the gas it
> becomes louder but lower pitched for a second or two. At idle the noise
> isn't noticed and isn't heard at highway speeds. I'd like to know whether
> it's a noisy alternator or a vacuum leak? I was assuming it was the
> alternator but then it could be associated with the check engine light
> that came on once recently, showing code 0121.


It might be exhaust noise. Exhaust whisling is unsual, but it can happen.


  #4  
Old May 7th 07, 10:30 AM posted to rec.autos.makers.chrysler
Ted Mittelstaedt
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Posts: 696
Default Engine noise


"Moses" > wrote in message
...
> This van I bought has a high pitched whine or whistle when driving
> around town.


Make, model and year, please. Engine size would be good.

Ted


 




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