Strange whistling noise - Need advice.
 

First time post for me.

I recently had the intake manifold on my 96 GT replaced after it blew at the drag strip and I swear the car is making a new noise since then. The best I can describe it is it's like a high pitched whistle. It doesn't happen all the time - mostly around 2200 rpms and only in 3rd or 4th gear.

I'm 99% sure it wasn't there before the intake replacement.

Any ideas as to what it might be?

Thanks in advance.

Sounds like a vaccum leak to me. What I used to do to find them was get a can of starting fluid(ether) and spray it around the intake and if the idle surges then you have a leak.

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00 GT, K&N, 2 chamber Flowmasters, MAC Tree Killer, Pullies, UPR shifter, Weld Pro Stars, Nitto DR’s,MM#100 13.46@99.63
88 LX coupe X-FHP, 12pt Cage, UPR K-member, 31 spline rear, full spool, more to come

Sorry, I can't help you with your problem, but I was glad to see another guy from mass on this site. Where do you race? I have not been to the strip since I left Ohio. Good luck with the problem.

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1995 GT
Edelbrock aluminum heads,Edelbrock aluminum intake,Edelbrock cam, 70mm TB,75mm pro-m mass air, Taylor wires, Underdrive pulleys,Equal length headers,K&N filter
Flowmaster cat-back
Eibach pro rate springs
lower control arms
3.73 rear gear

Best Time slip
1/4 et 13.86 @ 100.5 mph