Whistling noise

jp2005 · Post by **jp2005** » Thu Jun 06, 2019 1:00 am

Has anyone experienced a whistling noise when pressing the gas pedal into the higher rpms. Sounds like the build up pressure from intake for the transmission to shift to higher gear if that makes sense. Just curious if theres way to quiet it. Researching first bc God knows I've learned my lesson for messing with parts that are working haha

390xlt · Post by **390xlt** » Thu Jun 06, 2019 8:33 am

Sounds like a vacuum leak somewhere. Does it do it any time it revs (even in park or neutral), or just while driving?

1972hiboy · Post by **1972hiboy** » Thu Jun 06, 2019 9:54 am

The autolite 2100 has a natural tendency to make a whistling noise under acceleration. But if this is something out of the oridinary for your truck then I would agree with vacuum leak being the first thing to check out.

jzjames · Post by **jzjames** » Thu Jun 06, 2019 11:15 am

Do you have the emissions air pump on it? That was the culprit on my inline-6.

jp2005 · Post by **jp2005** » Thu Jun 06, 2019 4:14 pm

390xlt wrote:Sounds like a vacuum leak somewhere. Does it do it any time it revs (even in park or neutral), or just while driving?

That's what I thought, I havent checked yet. Only when it revs/drives

jp2005 · Post by **jp2005** » Thu Jun 06, 2019 4:15 pm

1972hiboy wrote:The autolite 2100 has a natural tendency to make a whistling noise under acceleration. But if this is something out of the oridinary for your truck then I would agree with vacuum leak being the first thing to check out.

It has a Holly 4160

jp2005 · Post by **jp2005** » Thu Jun 06, 2019 4:18 pm

jzjames wrote:Do you have the emissions air pump on it? That was the culprit on my inline-6.

I dont

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