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Re: Loud, high pitched whistle
Open the filter airbox. Is the noise coming from there? If so, you need to replace your Idle Air Control (IAC) Valve.
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2000 Mercury Grand Marquis LS - 119k / 14.89s @ 92.11MPH [ pictures | videos ]
> Dual Flowmaster Delta 40s / J-Mod / PI Intake Manifold & Cams / Marauder Air Box & 80mm MAF / 3.55 Trac-Lok
> Bumper Tuck / Steeda UD Pulleys / CVPI Zip Tube / Ported & Polished Plenum / BBK 70mm TB
> BOC 93 Octane Tune / Headlight Relay Upgrade / 17mm rear stabilizer bar / Heinous Aluminum Billet Rear Control Arms
> CVPI aluminum driveshaft
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