Question about 1998 Toyota T100

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My 96 t100 brake pedal just became very stiff and the check engine light came on (refrencing a code of a possible vacumm leak)any ideas?

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Hi:
You have a vacuum leak for sure. It could be in the power brake booster, or the vacuum hose that feeds it. The reason your brakes got stiff is you lost your power brakes, so your next thing to do is to try to find your leak!

Posted on Nov 12, 2009

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Considering the random nature of the problem, I would try this several times to see if the resulting drop in pedal height is constant or not.

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