1997 Ford F350 Hard Pedal but No Panic Braking

KEVINKELLY

MEMBER
1997 FORD F-350
V8
4WD
MANUAL
179,000 MILES

Initially, brake pedal was getting harder to push and the panic braking was getting less and less. Replaced booster, and it made pedal harder and had no effect on panic braking. Replaced booster again in case first one was bad. Pedal is harder still and absolutely no panic braking now. What have I done wrong or failed to do?

4 Replies

SEEUUSEE

MEMBER
3 POSTS

I would check the vacum pump located just above the power steering pump on the driver side of the engine!

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Friday, June 17th, 2011 AT 1:56 PM

DOCFIXIT

MECHANIC
18,828 POSTS

Gas or diesel?

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Friday, June 17th, 2011 AT 2:20 PM

SEEUUSEE

MEMBER
3 POSTS

Diesel's have vacum pumps due to the lack of vacum on the intake and most of them being turbo that would have positive pressure at the intake instead of vacum!

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Friday, June 17th, 2011 AT 5:06 PM

SEEUUSEE

MEMBER
3 POSTS

Older chevy's had what was called the hydro brake system that ran off the power steering pump on the trucks if the power steering pump was low or defective you would have a hard brake pedal however the diesel cars in the earlier 80's had a vacum pump it was located on the back side of the intake at the firewall! And they were notorious for failing! Hope this helps!

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Friday, June 17th, 2011 AT 5:45 PM