Whistling when accelerating
#11
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The main vacuum line going from the UIM looked OK. No cracks, etc.
Below is a pic of the PCV housing. There are two o-rings in there...should there be more?
And, here'* proof of the oil fill cap o-rings!
Bugsi--how did you positively identify the alternator making the whistling? I have a spare alternator...maybe I'll bolt it on and see if it still does it.
Below is a pic of the PCV housing. There are two o-rings in there...should there be more?
And, here'* proof of the oil fill cap o-rings!
Bugsi--how did you positively identify the alternator making the whistling? I have a spare alternator...maybe I'll bolt it on and see if it still does it.
#12
Senior Member
True Car Nut
Those o-rings all look like they're in the right places, vital. Check all your vacuum fittings and lines carefully. How old is your actual PCV valve? I don't know if it would help, but maybe you can throw another one in there.
#13
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Originally Posted by vital49
Bugsi--how did you positively identify the alternator making the whistling? I have a spare alternator...maybe I'll bolt it on and see if it still does it.
As for how they diagnosed it, I have no clue. I just trusted that they diagnosed it correctly. I guess technically I'm still just trusting that their diagnosis was correct.
#14
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Unplug the connector to the alternator, not the big wire but the plug with 2 or 3 small wires. If noise is gone, it'* the alternator. You can also remove the drive belt and see if the noise goes away, but don't run the engine too long without a belt or you'll overheat it.
#16
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In relation to whistling or whining noises, i'm always annoyed by the whine of alot of foriegn cars with the 4 bangers. Mazda'* are worst for it i think. I remember a Protege I had made a whine, which I sorta found annoying.
I don't have it anymore. I have something else better!!
I don't have it anymore. I have something else better!!
#17
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Thread Starter
Originally Posted by motorhead
Unplug the connector to the alternator, not the big wire but the plug with 2 or 3 small wires. If noise is gone, it'* the alternator. You can also remove the drive belt and see if the noise goes away, but don't run the engine too long without a belt or you'll overheat it.
But, I will bolt on the spare alternator I have and see if the whistle still exists.
#19
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Thread Starter
I worked on this issue last night...
I first replaced the PCV with a brand new one. Whistling was still present.
Then, I went on to the alternator. As suggested, I unplugged the 4 prong wiring harness off the bottom of the alternator. Went for a drive...still whistling. :?
My last resort was to replace the alternator with my spare. When I removed the old one from the car it spun freely, but I still had my doubts so I continued with installing the "new" one. Got it installed, went for a drive and STILL whistling.
I wasn't sure what to do at this point. So, I left the engine running and put a dowel stick as close to each pulley as possible and listened to the other end of the dowel stick for a whistle-type noise. I got nothing out of any of the pulleys other than the normal buzzing sounds from the bearings moving.
The only thing I can figure is that this is a vacuum related leak or my gatorback belt.
:?
I first replaced the PCV with a brand new one. Whistling was still present.
Then, I went on to the alternator. As suggested, I unplugged the 4 prong wiring harness off the bottom of the alternator. Went for a drive...still whistling. :?
My last resort was to replace the alternator with my spare. When I removed the old one from the car it spun freely, but I still had my doubts so I continued with installing the "new" one. Got it installed, went for a drive and STILL whistling.
I wasn't sure what to do at this point. So, I left the engine running and put a dowel stick as close to each pulley as possible and listened to the other end of the dowel stick for a whistle-type noise. I got nothing out of any of the pulleys other than the normal buzzing sounds from the bearings moving.
The only thing I can figure is that this is a vacuum related leak or my gatorback belt.
:?
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quikie
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09-30-2004 01:40 PM