The modulator pressure for that car is 4bar/ 58lbs at 45mph, with the modulator hose disconnected and plugged.

The feed line for the modulator is located on top of the intake manifold, ¼’’ steel line with a banjo fitting. Normal manifold vacuum at idle for an engine in good condition is about 18 to 22 in.-Hg.
Vacuum at the modulator should read 18 to 22 Hg.

At normal operating temperature the fluid level should be between the MIN and MAX .


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