Question about 1997 Chevrolet Astro
Check the engine compartment for a thin hard plastic line. This line runs across the fire wall with the wiring harness. These lines are known to be very brittle and brake easy. This line will run into the the cabin trough the fire wall with the harness as well. I've not seen then break inside yet. It comes in the firewall runs behind the gauge cluster to the heat and AC controls. From the firewall back to the heater. Follow the thin line back to the top of the heater box. On top of the heater in the engine compartment there is a vacume controled valve to shut off the hot water from entering the heater element. You can follow the thin line all the way to a canister located under the heater box it's self. From this canister follow a rubber line to the back of the engine to where it conects to the intake manifold. Check all these lines and hoses for any cracked or broken connections. All these can be replaces easily and at a very low cost. I replaced the thin plastic line with the same ID. Usually you'll find the brake in the plastic line on the firewall some where.
Posted on Feb 06, 2013
Check and see if you are getting vaccum to your vaccum ball under the hood.if you are then follow the vaccum line that goes to the inside of the vehicle until you find the vaccum leak.
Posted on Jan 24, 2011
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Posted on Jan 02, 2017
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Jan 22, 2016 | Cars & Trucks
Feb 02, 2013 | Chevrolet Cavalier Cars & Trucks
It's most likely a vacuum line, look
under your hood (close to the cowl panel) for a disconnected, cracked
or broken vacuum line.
In some rear cases, it could be the
vacuum switch (in dash). Or vacuum diaphragm (under dash).
Hope this helps you ???
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