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International Automotive Technicians Network
Re: Power brake booster operation and trouble shooting
Posted to Technical Discussion Forum on 1/16/2020

I've seen this issue several times over the years; turned out to be an adjustable "push" rod located between the master cylinder and the booster. Remove the master cylinder, pull the rod out and see if it is adjustable.

Thinking outside the box, if the rod i... Login to read more.