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Old 01-10-2011, 10:14 PM   #1
dlensing
 
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Default dies when cold

My 97 GT with 155000 miles starts ok in the morning. Whne I stop at the mailbox on the way to work it makes a howling noise and usually dies, Stats right back up and runs fine. Any ideas on wht could be wrong. No code.
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Old 01-11-2011, 06:22 AM   #2
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Whens the last time you changed the plugs?
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Old 01-11-2011, 11:09 AM   #3
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Originally Posted by dlensing View Post
My 97 GT with 155000 miles starts ok in the morning. Whne I stop at the mailbox on the way to work it makes a howling noise and usually dies, Stats right back up and runs fine. Any ideas on wht could be wrong. No code.
This sounds (no pun intended) as though the idle air control valve has failed and is chattering rather than doing what it is supposed to--more about this here.

What you describe is exactly how mine went out, at first just honking but later stalling out when cold...
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Old 01-11-2011, 09:25 PM   #4
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does this howling sound increase in noise when you rev the motor? I have a similar noise when the car is cold.
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Old 01-11-2011, 09:50 PM   #5
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does this howling sound increase in noise when you rev the motor? I have a similar noise when the car is cold.
In my experience the IAC related "howling", "honking", "French horn" noise has been unrelated to engine speed, and discontinuous--often silenced by "blipping" the throttle.

I would suggest that you may have another issue, perhaps related to some engine driven auxiliary device. Failed/failing generator, power steering, water pump, or idle pulley bearings can create engine speed related whines/howls/etc...
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Last edited by cliffyk; 01-11-2011 at 09:53 PM.
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Old 03-23-2014, 09:46 PM   #6
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Default iac valve

It was the IAC valve
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Old 03-23-2014, 09:46 PM
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