Question about 1997 Chevrolet S-10 Pickup

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Loose vacuum line, need to know where it goes

Does the air conditioning system have a vacuum line going to it, the air conditioner quits blowing when i accelerate and i am pulling more manifold pressure

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Vacuum drops at a higher rpm..ac system does have vacuum line goes to a small plastic ball it stores vacuum ..either that ball is broken or the one way check valve in line is bad

Posted on May 20, 2009

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I replaced the ac compressor a 97 Chevy Lumina 3.1 and everything is working right. The air is blowing through defrost vents but it is not blowing through front vents. Its a vacuum line loose that is...


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The air in your air handling system is usually directed by vacuum actuated servo's. That is, vacuum, produced, when your engine is running (when each piston goes down it creates vacuum) This vacuum can be Co-gen erated to be used in other parts of the vehicle. In this case, the air handling system. When, one moves the control arm or knob or button on the A/C control panel, this sends a vacuum or electrical signal to a given servo motor. This servo has a diaphragm that, when vacuum is introduced, it pulls the diaphragm "in" which in turn pulls or pushes a lever that operates a "door" inside your a/c plenum. This action directs air to the duct it was intended. Now, provided your particular car uses this system, I would check for any vacuum lines loose at the servo, or anywhere they connect.You might find a vacuum line loose under the hood. Listen for a hissing sound lke air escaping somewhere. You might find the problem.

theroad

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Just had the same problem. It was a broken vacuum line on top of the engine. Check all vacuum hoses, and especially the one that goes to your pot. You should hear it hissing when the engine is running. If not, wiggle them around until you find one. Let me know how it goes.

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Check for a broken or loose vacuum hose under the hood also........




Good luck........

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4 Answers

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