1HD Vacuum pump rate

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Joined
Jul 5, 2013
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Location
San Diego
Hi all, trying to diagnose some brake issues, needing to rule out vacuum. Seeing if any of the Toyota Guru's @SNLC, @KiwiDingo, @OGBeno have specs on the rate the pumps should be operating. Mine seems to be working, comes up to 27inches, not sure if the rate is sufficient to keep up with the booster demand, and if that's where my problem is. Not necessarily the pump but maybe internal to the engine not allowing the pump to vent fully, compromising its rate of vacuum.

Link to thread, explaining the entire issue I am having:

 

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