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#1
08-14-2012, 10:57 PM
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Vacuum Leak
Recently an annouying hissing sound started happening inside my dash. Its a vacuum leak for sure because I can unplug the line at the top of the supercharger that goes inside and the hissing sound goes away.
Whats Odd, as soon as I turn on anything HVAC, heat or AC, the hissing stops. Whats even more odd is everything with the HVAC works just fine, everything changes direction and the temp control works just fine. I need to get the hissing to stop, its super annoying, It may be time to trade the old girl in.  which is a shame after a new AC compressor accumulator orifice tube, rebuilt ABS module, and new rear calipers hoses and lines.  Anyone have a Vacuum diagram for the HVAC inside the dash? 2000 Grand Prix GTP, 189,750miles.
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<----- 
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#3
08-16-2012, 06:47 PM
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Re: Vacuum Leak
This is all I could find, hopefully it helps
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2004 GRAND PRIX GTP COMP G. VIN 4 : OVERKILL CUSTOM PCM, WIZAIR CAI, ZZP TRAILING ARMS, W BODY STORE LATERAL ARMS, ALL POLY/SOLID MOUNTS, STB F&R, ZZP RACE TRANS, ALT REWIRE & VOLTAGE BSTR, 180 STAT, NGK TR6, MPS with 3.4 PULLEY, PACESETTER HEADERS, 1.8 ROLLER ROCKERS, FP REWIRE,ZZP COILS/WIRES, TB SPACER, D&S ROTORS, INTERCEPTOR SCAN GAUGE, CUSTOM STAINLESS 2.5 INCH CAT BACK EXHAUST. 2004 Honda Odyssey EX-L 
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#4
08-16-2012, 10:58 PM
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Re: Vacuum Leak
Awesome Thanks. When I have time I'll have to dig into it. If it comes down to taking the whole dash out, its probably time to say goodbye.
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<-----
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