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Clips are ok. I'm not getting vacuum at the heater control valve. I know that the line ends up at the solenoid on the other end of the firewall, but where does the vacuum originate from? I want to check and make sure I'm getting suction in before I start replacing the vacuum solenoid or other expensive parts.
How does this work. Vacuum comes into the solenoid and the solenoid opens when the TCU tells it to?
There is a Vacuum canister under the plastic tray by the wiper arms.. I would get a vacuum checker and make sure that is good.. (looks like a plastic soup can).... 1st. chances are one of the doors are stuck.. I had this issue in my 86 but it was only for one day and the problem went away before I got home from my road trip... So I Assumed something was just stuck...and it fixed itself..
on the vario three liter, there are 4 rubber elbows that can turn to mush after a couple decades. check your vacuum sticker under the hood to see where the lines attach to your motor.
Agree on the rubber elbows and “Y” connectors used in abundance on these cars. Carefully remove them and blow through them to see how they flow. Better yet, remove and replace with new. Many on the small-diameter vacuum obstructions/leaks can be traced back to these connectors.
Agree on the rubber elbows and “Y” connectors used in abundance on these cars. Carefully remove them and blow through them to see how they flow. Better yet, remove and replace with new. Many on the small-diameter vacuum obstructions/leaks can be traced back to these connectors.
I pulled the glove box and got a look at the two solenoids. It's my understanding that the higher one controls the heater control valve? I ran the car and with a hand on the solenoid, switched through the settings, but could not hear the solenoid doing anything. I then pulled the lower vacuum line off and tested it for vacuum (thinking that it's the supply line), there wasn't any vacuum. can anyone confirm that I have the right solenoid and the supply side correct?
Last edited by Jordan Pryce; 03-01-2020 at 11:23 PM.
Reason: more
I found the problem. I wasn't making vacuum on the supply side so I was checking every fitting. This is what I found at the base of the intake. The small vacuum nipple has corroded away! I'll need to replace the intake or drill and tap for a new bung.
02-28-2020, 10:43 PM
vacuum sucks
