Why does the heat vent in a 1991 Sunbird only give heat through the defrost and the dash and not the floor?
The vaccum door near the gas pedal is broken or not receiving vaccum.
1991 Chevy 350 pick up 1500 heater display works and will get hot butt it wont go to the defrost and is weak on the floor and vents?
1991 Pontiac sunbird 2.0ltr ohc went to replace ignition control module plugs to module inside distributor disintegrated 7 prongs on module 7 wires how do you know which wire goes to which prong?
1991 Chevy G20 van- Why won't airconditioning blow out of dash vents instead of defrost and heat vents?
I had a Chevy van of this vintage and I found a vacum hose leak in the controls that would make the heater/defrost door default too defrost open. lisining carefully under dash or under hood may pinpoint leak. I had a Chevy van of this vintage and I found a vacum hose leak in the controls that would make the heater/defrost door default too defrost open. lisining carefully under dash or under hood may pinpoint…
Your ford ranger temperature gauge drops when you turn on the defroster it is a 1991 you have replaced the thermostat and flushed the coolant twice?
My friend, it is important that you get a shop manual for this job, if you are the one to do it. It doesn't take a rocket-scientist but one has to know much about how an engine works and safety. Now, if your'e asking bcuz you are going to do it and kow quite some on the subject, You really need to consult with a shop manual. Your question indicates to me that you have…