The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-07-2011, 04:36 AM   #1
slb1985
Registered User
 
slb1985's Avatar
 
Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
heat comes from the floor and vents only

I do have heat in my 87 with ac but the slecter switch isn't changing where it comes from I checked the rod on the box behind the glovebox and I can't move it with my hands I also checked the back of the selector switch and I don't have vacuum there but don't know if and when I should I also checked the little thing by the gas pedal and no vacuum there

Any thoughts on where to start to get it fixed...
Posted via Mobile Device
__________________
1987 R10 Silverado - Rusty But trusty Daily

1984 C10 Custom Deluxe - Newest Project
slb1985 is offline   Reply With Quote
Old 11-07-2011, 11:36 AM   #2
kelsfine69
18 Till I Die
 
kelsfine69's Avatar
 
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
Re: heat comes from the floor and vents only

sounds like no vacume...Check under the hood along the firewall for a broken vac line. its easy to see the line its out in the open
__________________
2011 GMC Acadia
1969 GMC BBC LS7
2007 GMC Crew Duramax
1987 Camaro Iroc 350 Tuned Port Injection
42000Km

1987 Chevrolet Silverado 350 TBI
1987 Chevrolet Silverado 350 TBI(yes 2)

Take me drunk, I'm too home...
kelsfine69 is offline   Reply With Quote
Old 11-08-2011, 03:45 PM   #3
motornut
78K & 79C Jimmys
 
motornut's Avatar
 
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: heat comes from the floor and vents only

look here
Attached Images
  
__________________
John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
motornut is offline   Reply With Quote
Old 11-23-2011, 02:19 PM   #4
slb1985
Registered User
 
slb1985's Avatar
 
Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
Re: heat comes from the floor and vents only

Good news is i found the problem i think... there is a hose close to the distributor this is broke off and sucking in air and no tube going into the firewall. But the problem is there isnt a tube going into the firewall, so i went to replace the broken line and have no idea where the other end attaches anyone have an idea?
__________________
1987 R10 Silverado - Rusty But trusty Daily

1984 C10 Custom Deluxe - Newest Project
slb1985 is offline   Reply With Quote
Old 11-23-2011, 03:37 PM   #5
crazeetxn
Registered User
 
crazeetxn's Avatar
 
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
Re: heat comes from the floor and vents only

Surely there's something around the carb or vac advance that's missing it's other half. Maybe the modulator on the tranny? Reckon you'd notice that though. Shoot a pic of what you have.

As far as not finding something into the firewall...has to be something out there that puts a vacuum to your A/C
__________________
1st - '68 long bed
2nd - '81 SWB
Now - '86 SWB, Edelbrock 1406/stock 350/700r4
crazeetxn is offline   Reply With Quote
Old 11-23-2011, 04:02 PM   #6
slb1985
Registered User
 
slb1985's Avatar
 
Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
Re: heat comes from the floor and vents only

Thanks crazee for making me go take a picture I don't know how I missed it but the broken hose was 3 inches from the other end just had to move the air cleaner out of the way a little more.....now i have defrost again it gonna be amazing
Posted via Mobile Device
__________________
1987 R10 Silverado - Rusty But trusty Daily

1984 C10 Custom Deluxe - Newest Project
slb1985 is offline   Reply With Quote
Old 11-23-2011, 10:49 PM   #7
crazeetxn
Registered User
 
crazeetxn's Avatar
 
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
Re: heat comes from the floor and vents only

Glad I could nudge you along It'll be nice to get some heat where it belongs again I'm sure...
__________________
1st - '68 long bed
2nd - '81 SWB
Now - '86 SWB, Edelbrock 1406/stock 350/700r4
crazeetxn is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:46 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com