1997 wont blow out the center a/c vents, WHY? - Page 7 - 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 06-16-2005, 01:44 AM   #61
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I have to go now,,,,, I will check back in the morning......
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Old 06-16-2005, 01:44 AM   #62
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Default Hmm

Well, I havent been able to look there yet as I have been taking the dash apart and looking behind the ECC box. I can go give it a try right now. Ill just peek at it with a flash light. If its too dark Ill have to do it inthe morning. Im studying for a microbiology test right now to. ICK
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Old 06-16-2005, 12:52 PM   #63
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did you find it?
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Old 06-16-2005, 01:17 PM   #64
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I have this Micro test Im studying for right now. I hope to dig into the dash before I go or tommorow. I went out lastt night and saw where to look. Once Itake the cover off, how do I get inside to see the vacuum lines, or are they visible allready?
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Old 06-16-2005, 01:25 PM   #65
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Default Re: looking

Quote:
Originally Posted by james tharp
I have this Micro test Im studying for right now. I hope to dig into the dash before I go or tommorow. I went out lastt night and saw where to look. Once Itake the cover off, how do I get inside to see the vacuum lines, or are they visible allready?
mine were visible, good luck
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Old 06-16-2005, 03:12 PM   #66
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Default Found the HVAC

Here is how mine goes.
O --------this is empty
1O O ----this is pink and goes up into the dash heading
2 O O---This one is lime green
O ----- this one is cream

1 is Dark blue
2 is red

No hissing sounds.
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Old 06-16-2005, 03:13 PM   #67
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Its supposed to be a circle. Imagine it if you can
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Old 06-16-2005, 04:55 PM   #68
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Quote:
Originally Posted by randman1
At this point, you may want to remove the HVAC programmer. You can disconnect the colored vacuum lines from the inside and put a vacuum gauge on the purple line. That'* the source. If it is determined that you have sufficient source vacuum, then it'* on to testing the little actuators in the programmer.

I believe your next step is to check for vacuum on the purple (you mention pink) line. You may want to wait for randman to guide us. I will be tearing into mine tomorrow a.m. I wish we didn't live so damn far apart. I'd be there to help you out.
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Old 06-17-2005, 12:30 PM   #69
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Default Lines

Im having a hard time finding where the vacuum line goes into the engine..Or the source. I think it was said it was near the Master cylinder. That is the big round thing where you put the break fluid in right?

Progressing not regressing How I feel moment to moment with this!!!
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Old 06-17-2005, 03:01 PM   #70
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My service manual was unclear as to the exact location of the source but it did have one line labeled "To Accessory". This line connects to the intake manifold right next to where the large vacuum hose for the brake booster connects. The brake booster hose is about 7/8" in diameter, black and goes from the booster on the firewall to the intake manifold. Your description of "That is the big round thing where you put the break fluid in" is nearly correct. brake fluid is inserted in the master cylinder which is bolted to the booster. You have the right idea though.
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