OK, so where do I start looking for a "vac leak"? Under the hood? behind
the radio?

Suggestions? (other than a dwarf chipmunk!)

Thanks

Jamie wrote:

> '99 XJ
>
> Turned my defrost on high only to hear a loud "whistling sound" and no
> air coming out the defroster (the side vents still work). All other
> settings work fine (vent, heat, AC, etc), just the defrost setting is
> acting up.
>
> Something inside the air box seems to be preventing the flapper from
> fully moving into the correct position for defrost.
>
> Suggestions????

 

Ooops, just noticed... it's 1999, I was thinking 89. Probably similar
removal.
-Brian

"Cherokee-LTD" <spammenot@home.com> wrote in message
news:XVP0b.249324$rsJ.182478@news04.bloor.is.net.c able.rogers.com...
: Locate the hissing sound, that will be the source of the leak... I think
: Mike is on the money with this one. Remove the dash panel, couple of
screws,
: remove the small plastic section under the steering column, snaps in place
: and pull the whole thing off. You may encounter a problem with
accessibility
: behind the heater control but it can be removed easily as well as the
radio
: but I think the vent is held in with plastic spot welds.
:
: -Brian
:
: "Football God" <Footballgod@heaven.com> wrote in message
: news:3F43C528.B10829FE@heaven.com...
: : OK, so where do I start looking for a "vac leak"? Under the hood? behind
: : the radio?
: :
: : Suggestions? (other than a dwarf chipmunk!)
: :
: : Thanks
: :
: : Jamie wrote:
: :
: : > '99 XJ
: : >
: : > Turned my defrost on high only to hear a loud "whistling sound" and no
: : > air coming out the defroster (the side vents still work). All other
: : > settings work fine (vent, heat, AC, etc), just the defrost setting is
: : > acting up.
: : >
: : > Something inside the air box seems to be preventing the flapper from
: : > fully moving into the correct position for defrost.
: : >
: : > Suggestions????
: :
:
:

 

Ooops, just noticed... it's 1999, I was thinking 89. Probably similar
removal.
-Brian

"Cherokee-LTD" <spammenot@home.com> wrote in message
news:XVP0b.249324$rsJ.182478@news04.bloor.is.net.c able.rogers.com...
: Locate the hissing sound, that will be the source of the leak... I think
: Mike is on the money with this one. Remove the dash panel, couple of
screws,
: remove the small plastic section under the steering column, snaps in place
: and pull the whole thing off. You may encounter a problem with
accessibility
: behind the heater control but it can be removed easily as well as the
radio
: but I think the vent is held in with plastic spot welds.
:
: -Brian
:
: "Football God" <Footballgod@heaven.com> wrote in message
: news:3F43C528.B10829FE@heaven.com...
: : OK, so where do I start looking for a "vac leak"? Under the hood? behind
: : the radio?
: :
: : Suggestions? (other than a dwarf chipmunk!)
: :
: : Thanks
: :
: : Jamie wrote:
: :
: : > '99 XJ
: : >
: : > Turned my defrost on high only to hear a loud "whistling sound" and no
: : > air coming out the defroster (the side vents still work). All other
: : > settings work fine (vent, heat, AC, etc), just the defrost setting is
: : > acting up.
: : >
: : > Something inside the air box seems to be preventing the flapper from
: : > fully moving into the correct position for defrost.
: : >
: : > Suggestions????
: :
:
:

 

Make a stethoscope out of an old hose.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Football God wrote:
>
> OK, so where do I start looking for a "vac leak"? Under the hood? behind
> the radio?
>
> Suggestions? (other than a dwarf chipmunk!)
>
> Thanks

 

Make a stethoscope out of an old hose.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Football God wrote:
>
> OK, so where do I start looking for a "vac leak"? Under the hood? behind
> the radio?
>
> Suggestions? (other than a dwarf chipmunk!)
>
> Thanks

 

If you can hear the whistling from inside, it may be quicker
to stick your head under the dash and see if you can get a
better idea of the direction its coming from. It *may* be
from out under the hood so check. A cheap stethoscope or
just a hunka hose stuck in your ear might help.

Approximately 8/20/03 11:59, Football God uttered for posterity:

> OK, so where do I start looking for a "vac leak"? Under the hood? behind
> the radio?
>
> Suggestions? (other than a dwarf chipmunk!)
>
> Thanks
>
> Jamie wrote:
>
>> '99 XJ
>>
>> Turned my defrost on high only to hear a loud "whistling sound" and no
>> air coming out the defroster (the side vents still work). All other
>> settings work fine (vent, heat, AC, etc), just the defrost setting is
>> acting up.
>>
>> Something inside the air box seems to be preventing the flapper from
>> fully moving into the correct position for defrost.
>>
>> Suggestions????
>

 

If you can hear the whistling from inside, it may be quicker
to stick your head under the dash and see if you can get a
better idea of the direction its coming from. It *may* be
from out under the hood so check. A cheap stethoscope or
just a hunka hose stuck in your ear might help.

Approximately 8/20/03 11:59, Football God uttered for posterity:

> OK, so where do I start looking for a "vac leak"? Under the hood? behind
> the radio?
>
> Suggestions? (other than a dwarf chipmunk!)
>
> Thanks
>
> Jamie wrote:
>
>> '99 XJ
>>
>> Turned my defrost on high only to hear a loud "whistling sound" and no
>> air coming out the defroster (the side vents still work). All other
>> settings work fine (vent, heat, AC, etc), just the defrost setting is
>> acting up.
>>
>> Something inside the air box seems to be preventing the flapper from
>> fully moving into the correct position for defrost.
>>
>> Suggestions????
>