Mechanics

PROPORTIONING VALVE OR COMBINATION VALVE

1991 Toyota Van • 300,000 miles

I just perched a 1991 Toyota liteAce Van and am having trouble with the brakes, it is the Brake proportioning valve or the Brake Combination valve I don't know what they call it in the Toyota, but it is letting brake fluid pass threw it so the brakes are spongy and I can't get a good hard brake pedal, so my question is what is the difference between a Brake proportioning valve and a Brake Combination valve?
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Harley Schlinger
July 3, 2013.



The proportioning valve is just that the combo valve also has a metering valve for front brakes the pro valve doesn't. You have a combo but bleed your brakes or you have a bad master cylinder.

Hmac300
Jul 3, 2013.