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97 Ford F350 7.3L diesel with 165,000 miles. The brake ...

Sent to Car Experts February 26 04:03 PM

97 Ford F350 7.3L diesel with 165,000 miles. The brake warning light will come on when you pump the brake pedal 6 or more times. The fluid is ok . i also checked the booster and that seems to be ok. Any suggestions?

Optional Information:
1997 Ford F350 7.3

Customer (name blocked for privacy)
Status:  Closed   Value: $25
Answer
February 26 4:25 PM (22 minutes and 17 seconds later)
         
ACCEPTEDCheck Mark

That truck has a vacuum pump instead of using engine vacuum for the brakes . Unless you notice some shortfalls in the braking efficiency,I would not worry about it.

What is happening is you are using up all the vacuum in the system and the low vacuum sensor is turning on your brake warning light. If you think your brakes are becoming hard to apply your vacuum pump may have become weak and will need to be replaced . It can be checked with a vacuum gauge it should build 20 inches of vacuum in 1 second after the engine is started. If not it is not up to snuff and should be replaced.

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Marc -- Technician -- 98% Positive Feedback on 1030 Car Accepts
33 years exp. automotive repair NYS emisisions repair cert.
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