Check the intake hose. If it is not on the turbocharger properly, it can suck in dirty air and whistle or whine. One other guy on a forum had a similar noise, and that's what it turned out to be.
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Black 2004 PT Cruiser GT with chrome accent package, chrome door spears, billet gauge eyebrows, chrome beltline, Autotechnica tail light covers painted body color, TYC by Elegente backup lights and GPS Navigation. Silver dragons on sides and hood. Stage 1! Spark plugs gapped to .040, and installed a set of Crane Firewires. BTG cold air intake, AMX1397\'s Turbo Up Charge Pipe, Boomba Racing BOV, Hallman Pro PX manual boost controller and Mean Green\'s Hyperground Solution.
http://mysite.verizon.net/vze247vu
http://www.ptcruiserworld.com/Junior
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