My car hisses while running... any ideas?

[ACV1081]

Maybe I got a cobra SHO cause it hisses like a snake & is annoying as ****. I never really noticed it but everytime someone rides in my car they ask me what that noise is. It seems to be more when I have the heat on but I'm not leaking any fluids & the noise remains even after the ECC is turned off. Any general ideas??? I am not too concerned since nothing adverse is happening but it still is moderately obnoxious. Oh & it seems to originate towards the center of the dash or maybe under the hood. Thanks for any info.

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~Adam Varney~ mailto:[email protected][email protected]</A>
1993 RED ATX(3 replacements) W/shiftkit, 17" Konig Reigns, 245/45/17 Goodyear F1 Gs(Summer), 26mm ASB w/poly bushings, Tweaked stock airbox with K&N panel filter, D4U1 computer, blazertech fogs, & performance friction brake pads. GTECH time 0-60 in 7.02 1/4 15.58 @ 91.
Not yet installed: SHOSHOP Stut tower braces(front & rear), 24mm ASB(spring), all 60K service items, & rest of the poly bushings... Upcoming: Definitely saving for a y-pipe. GOING TO TEXAS Dec. 26 TO HAVE SDPATT DO 60K!

 

[buechine]

Vacuum Leak? A hose may have come off or cracked in behind the dash.

 

[SHOTIME]

Deffinatly, get under the hood, locate the noise. Belts could be loose(or too tight) could be a vaccum leak, (any of the boots on the runners or plenums)or a hose that has come loose or was forgotten at a recent service.

Check it out.

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Eric
mailto:[email protected][email protected]</A>
http://people.ne.mediaone.net/billebobob/index.html

 

[Bizzy]

Originally posted by ACV1081:
Oh & it seems to originate towards the center of the dash or maybe under the hood. Thanks for any info.

Is it coming from in the dash or under the hood or perhaps under your car? If it's under the car I'd say you have a cat leak. That makes a very irritating hissing noise.

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Proud to be an American!

Beth
'91 Plus MTX, Mostly stock
K&N Filter, Coneless
Colgan Custom Bra
Racing Series Driving Lights
Mods in the works
Many items on wish list!

 

[Blast7]

Go to the driver's side rear wheel and listen. If there is a hissing there then I would say your due for a fuel pump. If not then I am not sure although may K&N panel filter makes an awfully loud sucking sound even at idle. I'm not sure if that is right or maybe I have a vacuum hose leaking.

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1991 Black MTX
K&N Filtercharger
PP Motor Mounts
Rod Shifter
Blazer Tech Fogs
Want to Buy:
~1st Gen Black rust free trunklid
~1st Gen Black rust free front door mouldings

 

[ACV1081]

Ok investigated this & it is coming from right underneath the center console by the shifter & cup holder. It would make sense because I had that out while installing my amp controls however I have no idea what is causing the noise. Are there vaccum hoses under there?? Please help it's driving me nuts now. Thanks.

 

[slosho]

If you have an auto, the vacuum lines connect to the front of the shifter, their purpose is to release the parking brake when you put the car in "drive".


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95' ATX Silver Frost
Cone Filter W/ heat shield
TB coolant Bypass
Bypassed a few "PCV" line
Lighting mods
Sony head unit (el cheapo cdx-650)
JL Monoblock 500
JL 2-12w3's
Rear tint
More to come.