Vibration/Whine at 4000 rpm and above

[Andy]

One of my GT's is going out of warranty at the end of the month. I have noise that starts at about 4000 rpm and is only heard under hard acceleration. The car is completely stock. It been taken apart two times and still no success in pinpointing the source of the noise. The last time he wrapped the AC lines and part of the fuel lines with foam tape thinking that would help, but to no avail. All belly pans and exhaust parts have been checked out. Any ideas on what else he can look at. Has there been any motor mount problems? The car will go back in next week for some other minor warranty items. Any help would be greatly appreciated. This noise started last Summer. I'd like to get this taken care of under warranty. Any ideas?
Thanks,
Andy

 

[timcantwell]

Has the oil level (or the overall health for that matter) in your supercharger been checked?

I had a strange vibration that turned out to be a fuel line that was vibrating against the bulkhead. It sounds like the supercharger could use a check up though.

 

[paul b]

Did you have the half shaft update? Maybe something out of balance or loose.

 

[GTNJ]

" Whine at 4000 rpm and above "

I thought this was about the wife. :rofl :rofl :willy





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[fjpikul]

Supercharger belt?

 

[GTNJ]

Frank ......................come out to Carlisle ............I'll buy ya dinner. :thumbsup

 

[fjpikul]

Doug, I'd love to, but I'll be out of the country.

 

[Indy GT]

It?

It been taken apart two times and still no success in pinpointing the source of the noise. Andy

Andy, can you be more specific.....what is IT?
The engine, supercharger, car or what?
We need a little more information in order to help you out.

 

[HHGT]

Sounds like the Rattlesnake syndrome.

 

[AlohaGT]

Sam, love that quote!

 

[Andy]

Sorry I have been out of pocket the last several of days. The mechanic thinks it is a mechanical vibration. I agree with him. He has checked all the fluid levels. It sounds to me to be coming from the tunnel, he thinks it is coming from the engine compartment. The supercharger belt has been checked. Tim, I will have him check the fuel line. It only does it under hard acceleration. Something vibrating when it making torque? Accufab half shaft bolts were done within the first month of ownership. Any other ideas?
Andy

 

[HHGT]

I will bet you a beer that if you were to insulate the 2 copper tubes by the fuse box the noise will drastically diminish.

Take off the fuse box cover, go for a ride, take a mechanic with you - left foot with sock off - accelerate and feel the vibration.....

 

[HHGT]

Sam, love that quote!

How are the islands my friend. I am due for a vacation..... Off to the UAE late June, perhaps in August.

 

[AlohaGT]

How are the islands my friend. I am due for a vacation..... Off to the UAE late June, perhaps in August.

The good news for you is there are plenty of rooms and value (read discounts) has never been greater. The bad news for us in the industry is...the same.

August would be perfect. Let me know when you have some dates. Looking forward to seeing you.