middle a/c vent - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 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 and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-25-2003, 12:47 AM   #21
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The URL for the web site that I got my info from is:

http://www.imcool.com/articles/airco...acuum_line.htm

Good Luck!

Jaime
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Old 06-25-2003, 01:36 AM   #22
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Also, let us know if your temperature display blinks when you turn the car on.
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Old 06-25-2003, 09:02 AM   #23
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Where exactly is this vacuum reservoir located? I have looked to the left of the master cylinder and I do not see what you all are describing............is it different on a 96 model??
I have the standard a/c controls, but I have had a problem with the air switching to the defrost under acceleration for a long time now............
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Old 06-25-2003, 11:37 AM   #24
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Quote:
Originally Posted by Dylansdad
Where exactly is this vacuum reservoir located? I have looked to the left of the master cylinder and I do not see what you all are describing............is it different on a 96 model??
I have the standard a/c controls, but I have had a problem with the air switching to the defrost under acceleration for a long time now............
The vacuum reservoir is usually over on the passenger'* side, mounted on the firewall or the evaporator core housing, somewhere in the area of the right (passenger'* side) hood hinge. Its location varies from one model to another. It'* a sperical, black plastic thing maybe 4" or 5" in diameter.

If air switches to the defrost under acceleration, you're losing intake manifold vacuum. The reservoir is supposed to compensate for that short-term, but if yours keeps running out, look for a vacuum leak somewhere, or excess backpressure from a partially clogged catalytic convertor. (If your top-end speed is down, or the transmission hunts in and out of lockup at highway speeds, check the convertor.)
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Old 06-25-2003, 08:10 PM   #25
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Thanks Jaime for the info, i'll try that out this weekend.

Quote:
Originally Posted by fuddyduddy121
Also, let us know if your temperature display blinks when you turn the car on.
When i turn on the car, the display doesn't blink. Everything appears to be normal.

acg_ssei, i looked all around to see if anything was dissconnected the other day and couldn't find anything but i'll take a closer look this weekend.
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Old 06-26-2003, 07:28 AM   #26
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I have a 92 ssei and I have just about the same problem, but mine is blowing some air from the vents. I have changed the blower and it didn't help.any ideas?
I just found your site the other day and I think it'* great, I've already used info to diagnose a low freon problem which will be fixed Monday. Thanks
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Old 06-26-2003, 07:29 AM   #27
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I have a 92 ssei and I have just about the same problem, but mine is blowing some air from the vents. I have changed the blower and it didn't help.any ideas?
I just found your site the other day and I think it'* great, I've already used info to diagnose a low freon problem which will be fixed Monday. Thanks
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Old 06-26-2003, 11:55 AM   #28
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Quote:
Originally Posted by ssei2
I have a 92 ssei and I have just about the same problem, but mine is blowing some air from the vents.
If the problem is a general lack of volume, you're getting some air from the center vents but not a lot, you might need to clean out the heater cores and evaporator cores. There'* a procedure for that in the TechInfo area: http://www.bonnevilleclub.com/techinfo/?article=62
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