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Hello,
The switch is to actuate a vacuum solenoid to control the EGR valve for cars sold in California.
On non-California cars the EGR valve is actuated by a vacuum port on the intake manifold.
According to GCP, the 4 injector lines for a 1975 240 which are a little longer are still available, but would cost almost $400.00 for all 4 lines.
Volvo used to sell just the plastic line and you would reuse the fittings.
But installing new lines on the fittings is not easy.
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Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502
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