weird noise @startup....
04-06-2004, 06:13 PM
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weird noise @startup.... hello, please tell me if this is normal or not for a 98Z28,A4, 30,000 miles.
When I start the car, there is a loud whirring noise, I think it is a fan, but it really hums. After about 5 minutes it stops, and does not come back on. The mornings have been cold, so I don't know why the fan would be actuating. I don't drive the car much, and it has done it more or less the whole 2 years I've had the car. Please help??
Also, lately there seems to be a squeaking noise coming from somewhere, when I put the car in park, get out, and inspect the engine, no noise. But when you drive, you hear it?? I was thinking either a wheel bearing or a U-joint?? What could be hurt from so little use(although I do get on it to test out new parts and such, but not badly..)??
When I start the car, there is a loud whirring noise, I think it is a fan, but it really hums. After about 5 minutes it stops, and does not come back on. The mornings have been cold, so I don't know why the fan would be actuating. I don't drive the car much, and it has done it more or less the whole 2 years I've had the car. Please help??
Also, lately there seems to be a squeaking noise coming from somewhere, when I put the car in park, get out, and inspect the engine, no noise. But when you drive, you hear it?? I was thinking either a wheel bearing or a U-joint?? What could be hurt from so little use(although I do get on it to test out new parts and such, but not badly..)??
04-06-2004, 06:21 PM
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Originally Posted by Mustang5.Ohater
That's the pump for the AIR system when the engine is cold it pumps "AIR" into the exhaust to help warm up your cats faster.
04-06-2004, 06:35 PM
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Originally Posted by Mustang5.Ohater
lets just say it's noticeable 
the pump is located in front of the drivers side wheel
the pump is located in front of the drivers side wheel
04-06-2004, 06:40 PM
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Originally Posted by Mustang5.Ohater
maybe a bushing..... do you hear it more when you go over a speed bump?
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04-06-2004, 07:59 PM
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Originally Posted by Mustang5.Ohater
That's the pump for the AIR system when the engine is cold it pumps "AIR" into the exhaust to help warm up your cats faster.
--VIP1
04-06-2004, 08:44 PM
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Originally Posted by VIP1
To my knowledge, that system is only on 2001 and 2002 models. The 1998 F-Body did not have an AIR system.
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04-06-2004, 08:50 PM
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VIP1, its my personal experience that '98s DO have the AIR as well as the EGR provisions. I had a '98 formula ws6, and it definitely had the AIR system. Couldn't miss the whirring when you started her up. If its an f-body LS1, and in stock trim, you've got the AIR system.
04-06-2004, 09:42 PM
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Originally Posted by cyphur_traq
VIP1, its my personal experience that '98s DO have the AIR as well as the EGR provisions. I had a '98 formula ws6, and it definitely had the AIR system. Couldn't miss the whirring when you started her up. If its an f-body LS1, and in stock trim, you've got the AIR system.
