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vacuum leak question 200 1981

posted by  mgould on  Sun Mar 6 09:22 CST 2005
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My 81 240 is idling poorly, getting poor mileage, and is exceedingly gutless. I have found and repaired several vacuum leaks. This has improved the situation. I suspect there are others that I haven't found yet. I am deeply suspicious of a little gizmo on the top of the fire wall near the wiper motor. It has a vacuum tube goin into it nd a wire coming out of it. It seems to be making a hissing sound when the car is running. If I unplug the tube while the car is running the engine dies. Can anyone tell me what this thing is so I don't look like a jerk when I go looking for a new one? Thanks in advance.

Matt Gould
New amateur volvo mechanic






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