96 Bonneville Vaccuum Leak

Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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driveway Al
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Year and Trim: 1996 Pontiac Bonneville

96 Bonneville Vaccuum Leak

Post by driveway Al »

Hey, need some help, I dont have any air blowing out of the vents. Only blows on defrost. I am not sure if this has anything to do with it but I did notice a broken line going to the vac. accumulator. Has anyone ever had this problem before. Thanks.

Driveway Al
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J Wikoff
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Re: 96 Bonneville Vaccuum Leak

Post by J Wikoff »

That is likely the exact problem. That vacuum reservior on the firewall (or where ever it is on a 96) is where the HVAC gets its vacuum supply to move the air diverter. The flap defaults to the defrost/floor position when there's no vacuum present.
Last edited by J Wikoff on Wed Oct 26, 2011 9:36 am, edited 1 time in total.
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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
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impala67
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Re: 96 Bonneville Vaccuum Leak

Post by impala67 »

there is good tips about fixing these on how-tos. might be a good time to clean the core while at it, its done usually from engine bay side, and cleaning it helps the amount of blow also. heater cores get really dirty since we dont have any fresh-air-filter in front of it to collect the debris.
sorry i´m from europe-expressions and understanding varies
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willwren
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Re: 96 Bonneville Vaccuum Leak

Post by willwren »

Isn't the vac accumulator in the fender on a 96? Not on the firewall like a 95 and older?

Evap cleaning is in Techinfo.
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J Wikoff
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Re: 96 Bonneville Vaccuum Leak

Post by J Wikoff »

Maybe? I don't know.
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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights
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gmman
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Re: 96 Bonneville Vaccuum Leak

Post by gmman »

96 vacuum tank is under passenger front fender below headlight.
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psburtis
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Re: 96 Bonneville Vaccuum Leak

Post by psburtis »

hey, i have the same problem with my 96. driveway, could i get some pics of the area i need to look at once you've fixed the problem?? that would help a lot.... thanks!
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psburtis
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Re: 96 Bonneville Vaccuum Leak

Post by psburtis »

hey, is this the problem i'm looking at right here? if so, how do i fix it?

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1996 SE - RIP 7/11/12
1995 Caprice SS - Functional Ram Air hood, 373 auburn posi, Bbk 52 mm throttle body, Cold air intake, B&m ratchet shifter, Built tranny, Leather interior, Hyper tech tune
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