Yeah so the other day it started to rain and my windshield started to get all foggy and crap. so i go to turn on my defrosters which i have not turned on in awhile. (since my engine swap) And nothing happens. i am getting air through the reg. vents but no matter what button i push to change the direction of air flow nothing changes. and only my 3 and 4 setting work on the air flow control. So is it electrical? what should i do? any one know how to fix this. cause winter is coming and i will be screwed if i dont figure a way to defrost my windshield.

Thnks

Vacuum line to the white vacuum accumulator on the passenger side firewall is disconnected, cracked, etc.

 

GD

Vacuum line to the white vacuum accumulator on the passenger side firewall is disconnected, cracked, etc.

 

GD

Or maybe a pinched tube. Had mine get under the spare tire and got pinched off.

and if it's not the white vacuum canister (it usually is, especially since you were messing around in the engine bay) then the push-button control unit may have a leak, or a disconnected main hose that goes to that canister...

 

my problem was a different one in that only my defroster didn't work... turned out to be the diaphram behind the glove box... major PITA...

 

 

--Spiffy

is this line inside my dash or in the engine bay? the white thing in my engine bay on the passenger side does not have any broken lines that i see

Do these things have a vacuum manifold?...

is this line inside my dash or in the engine bay? the white thing in my engine bay on the passenger side does not have any broken lines that i see

 

there should be a vacuum line going from the canister to the intake manifold. From the other side of the canister should go across the back on the engine bay and into the dash.

 

If you don't hear any vacuum leaks from the dash (inside the car), I'd guess the problem is under the hood.

there should be a vacuum line going from the canister to the intake manifold. From the other side of the canister should go across the back on the engine bay and into the dash.

 

If you don't hear any vacuum leaks from the dash (inside the car), I'd guess the problem is under the hood.

 

trace the vacuum line from the intake manifold, to the canister, out into the line crossing the firewall, and into the engine bay. there are a couple of joints in the line where its possible something has gotten old and cracked, or simply been popped off.

 

listen to your car real carefully when your sitting parked, at idle.. is it running nice and smooth or is there a little bit of a buck to it? my vacuum line got disconnected and i didnt notice it (only using AC in the summer) until i realized that i had this misfire at idle.. i looked everything over and finally got to the least likely corner of the engine bay and found my problem.

 

At least while i was there, i fiddled with the connector to the factory cruise unit and got that to work, for the first time, EVAR!!!! and i know it wasnt the vacuum problem with that, as i had tried turning it on as soon as i got the car.. i know it failed with the vacuum canister intact. i dunno if the cruise worked off that vacuum circuit or not, but that was two birds with one stone, that day.