Power Brakes Cutting in and out

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01-14-2013, 04:46 PM

jgavac

Cargo Master

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Power Brakes Cutting in and out

The past couple days the power brakes on my 87 F250 6.9 cut out when I'm least expecting it. They come back after a few pumps. Any ideas to what could be causing this?

Thanks
Jameson

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01-14-2013, 04:57 PM

Phy

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Vacuum leak, bad vacuum pump, or bad brake booster...

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01-14-2013, 05:05 PM

jgavac

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That's what my guess was, but I wasn't totally sure because of the zf hydro lines are joined with the vacuum booster

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