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11-07-2011, 04:36 AM | #1 |
Registered User
Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
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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
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1987 R10 Silverado - Rusty But trusty Daily 1984 C10 Custom Deluxe - Newest Project |
11-07-2011, 11:36 AM | #2 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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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
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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... |
11-08-2011, 03:45 PM | #3 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
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Re: heat comes from the floor and vents only
look here
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
11-23-2011, 02:19 PM | #4 |
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Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
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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?
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1987 R10 Silverado - Rusty But trusty Daily 1984 C10 Custom Deluxe - Newest Project |
11-23-2011, 03:37 PM | #5 |
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Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
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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
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1st - '68 long bed 2nd - '81 SWB Now - '86 SWB, Edelbrock 1406/stock 350/700r4 |
11-23-2011, 04:02 PM | #6 |
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Join Date: Jul 2010
Location: Sandusky,OH
Posts: 71
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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
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1987 R10 Silverado - Rusty But trusty Daily 1984 C10 Custom Deluxe - Newest Project |
11-23-2011, 10:49 PM | #7 |
Registered User
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
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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...
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1st - '68 long bed 2nd - '81 SWB Now - '86 SWB, Edelbrock 1406/stock 350/700r4 |
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