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Diagnosis Help

Old 04-20-2009, 03:40 PM
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84 F150
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Default Diagnosis Help

Hi All,

I have an 84 F-150, 6cyl. Problm I have is I am loosing my brake pedal at stop lights - goes to the floor and then I pump the pedal and it comes back. I do not see any fluid leaking from any of the wheels. This happened to my car once and was the master cylinder. In that case I had brake work done and they did not bleed the brakes properly. In this case I ddi not have any brake work, just started happening. The brakes are in good shape. Can a master cyl.inder just go? Or could it be that I do not see fluisd but maybe I have a small leak in one of the wheel cylinders or calipers?

Thanks for any help.

Dave
Old 04-20-2009, 03:43 PM
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We'd do it

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It may be the master cylinder. They can leak air but not fluid so you won't see any leaks.
Check the wheel cylinders too.
Old 04-23-2009, 01:10 AM
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Replace the Master Cylinder. Problem solved.


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