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post #1 of (permalink) Old 08-20-2001, 02:02 PM
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Occasional engine noise

I have a 99Tahoe that sometimes has a much louder engine roar when accelerating, and it even cuts out sometimes (get quieter). Is this the fan spooling up?

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post #2 of (permalink) Old 08-20-2001, 04:50 PM
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Re: Occasional engine noise

My 97 does this. I think it is the fan. Does it do it more often when accelerating from 30 to whatever, or is it more from idle to whatever. Mine is from idle and usually lets go and stops roaring @ 2800 rpm. Sometimes it lasts up to when I shift into 3rd. I've been told that as long as it does disenguage it is ok, but I'll never hit a water crossing while it's doing that.

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post #3 of (permalink) Old 08-20-2001, 04:59 PM
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Re: Occasional engine noise

My '98 K1500 with the 350 does that once in a blue moon, but it's very INfrequent. I've also noticed it only seems to do it when I am accelerating from a cold start the first one or two times. WHat di you guys mean "the fan spooling up" I've always figured it was the fan, but anyway.

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post #4 of (permalink) Old 08-20-2001, 05:29 PM
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Re: Occasional engine noise

the only time the truck should spool up is with a turbo [img]/wwwthreads_images/icons/tongue.gif[/img]

yeah, more than likely its the fan making the noise. my old truck did that, but it was usually after it was idling for a while. don't know why, but it just did that. had no trouble though.

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Your what is stuck? [img]/wwwthreads_images/icons/crazy.gif[/img]
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