Strage problem!!! - 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 06-14-2007, 12:32 PM   #1
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Default Strage problem!!!

'94 Bonneville SE

I just got her back from the shop. She was running like crap. Turns out it was one of the coil packs. My mechanic said she was running on 4 cylinders.

She is running fantastic right now. I even got a little burnout leaving the parking lot. (Been quite a while since i had that!)

The problem is, since I picked it up this morning, the A/C will only blow out of the top of the dash and in the footwell. There is nothing coming out of the vents, regardless of the setting I put it on.

Can anybody think of what could be causing such a thing? It was blowing fine when I took it in Tuesday...
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Old 06-14-2007, 12:37 PM   #2
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If you look under the hood at the firewall.. you will see black box like (vacuum canister) on the firewall next to the brake booster/wiper motor. Plug the vacuum hose back into the bottom of it and all will be restored.
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Old 06-14-2007, 12:52 PM   #3
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Please put your 94 SE in your signature. It'll help us help you in the future.
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Old 06-14-2007, 01:58 PM   #4
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Great. Thanks guys! I bet that is the problem. They must have knocked it loose while they were under the hood.

I will add a picture of my beater to my sig. Yall should get a kick out of it. LOL
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Old 06-14-2007, 02:59 PM   #5
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It'* amazing the little things that can get knocked loose on these things.

And I bet WillWren meant to put your year and model in your sig in text, so people automatically know which vehicle you have.
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Old 06-14-2007, 03:40 PM   #6
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Honestly..the vacuum line probably needs to be replaced. However.. hooking it up will temporarily solve the problem.
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Old 06-18-2007, 04:40 PM   #7
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Bill was dead on. The vacuum line was disconnected at the firewall.

The problem is however, that the reason it was disconnected is that the "nipple" that the vacuum line attaches to has broken off from the firewall. Once I disconnected the hose from the bottom of the vacuum pump, I could see the nipple inside the hose. It literally crumbled as I pulled it out of the hose.

So now there is a hole in the firewall where the nipple used to be

I am completely at a loss. Has anybody experienced anything like this before?

Is that plastic shielding a replaceable part?

Is there any harm to driving it as is (with the A/C coming out of the defroster vents) ?

Should I at least plug the holes in the firewall and the bottom of the vac pump?

Any suggestions are greatly appreciated...
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Old 06-18-2007, 05:11 PM   #8
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You can get a replacement from the wrecker. That'* probably your best bet.
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Old 06-18-2007, 05:25 PM   #9
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Thanks. I am guessing I just need to replace the whole Map Sensor...

Will this one work for me? LINK
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Old 06-18-2007, 05:44 PM   #10
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Your car doesn't have a MAP sensor.
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