88 firebird Air stuck on defrost. Where is the vacuum pump?

Asked by cadrans2 May 27, 2013 at 02:18 AM about the 1988 Pontiac Firebird STD

Question type: Maintenance & Repair

My son bought an 88 firebird. The air is stuck on defrost. It looks like it all runs off of vacuum lines but I can't find the pump or other solution.

1 Answer
201,065

dandyoun answered 11 years ago

If vacuum line to intake is ok I would check behind your ac control unit under the dash. I believe you will fine what I call a five way vacuum deverter that controls your flaps in the duct work. Your main vacuum line feeds it. When they go bad you will only have defrost. With the age of your car I would suspect it needs to be replaced. Hope this helps

Mark helpful

Your Answer:

Related Questions

  • 88 firebird Air stuck on defrost. Where is the vacuum pump? 1 Answer

    My son bought an 88 firebird. The air is stuck on defrost. It looks like it all runs off of vacuum lines but I can't find the pump or other solution.

    1988 Pontiac Firebird STD

    -

    Maintenance & Repair

  • Where is the fuel pump relay located on a 1995 Pontiac Firebird 3 Answers

    Where is the fuel pump relay located on a 1995 Pontiac Firebird

    1995 Pontiac Firebird

    -

    Maintenance & Repair

  • where is the AC relay located on a 1991 Firebird 2 Answers

    I have no power to the AC clutch assembly. When I pull power direction the clutch will engage. It seems that maybe the relay got smoke when the EGR valve went. V6 3.1

    1991 Pontiac Firebird Base

    -

    Maintenance & Repair

  • fuel issue on 88 firebird 2 Answers

    i have fuel issue my car will run and drive but cuts out like its not getting fuel.ive replacede the fuel pump fuel filter anf fuel pump relay but it still is doing the same thing it just cuts outany ...

    1988 Pontiac Firebird

    -

    Maintenance & Repair

  • where is the water pump 1 Answer

    the water pump appears to be leaking

    1996 Pontiac Firebird

    -

    Maintenance & Repair

Shortcuts

Search Pontiac Firebird Questions

CarGurus Experts

  • #1
    Samuel Moore
    Reputation
    1,600
  • #2
    taver91
    Reputation
    1,340
  • #3
    Paul Martin
    Reputation
    1,280
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Camaro
14 Great Deals out of 290 listings starting at $9,995
Used Chevrolet Corvette
20 Great Deals out of 1,086 listings starting at $15,000
Used Ford Mustang
58 Great Deals out of 1,378 listings starting at $4,995
Used Dodge Charger
34 Great Deals out of 738 listings starting at $3,400
Used Pontiac Grand Prix
1 listing
Used Ford F-150
310 Great Deals out of 14,102 listings starting at $1,712
Used BMW M3
93 listings starting at $15,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.