Search results for query: *

Forum search Google search

1. 

   Buzzing under hood - brake pressure unit?

   I'm going to answer my own post: it appears that 4 pumps between pump cycles is normal. my fully scientific survey of two cruisers proves this :). actually, on my buddy's 03 it was about 3 pumps between pump cycles. After reading about the 40 pumps in the FSM bleed procedure I was thinking...

   • Words: 82
   • OregonLC
   • Post #5
   • May 26, 2011
   • Forum: 100-Series Cruisers
2. 

   Buzzing under hood - brake pressure unit?

   So... how often is 'normal'? I was playing around today and find that key on, vehicle not running I can get 4 good hard pumps before it kicks on. It runs for 5 seconds or so then turns off. Completely repeatable each time. FSM doesn't mention how many pumps is good, but it does talk about...

   • Words: 120
   • OregonLC
   • Post #4
   • May 25, 2011
   • Forum: 100-Series Cruisers
3. 

   Buzzing under hood - brake pressure unit?

   That is the pressure accumulator for the brake system. A pump periodically runs to build pressure. The accumulator 'stores' this pressure until needed by the system. The buzzing you hear is the power brake pump. I sometimes hear mine at startup but then never again, although I'm sure it runs...

   • Words: 60
   • OregonLC
   • Post #2
   • May 22, 2011
   • Forum: 100-Series Cruisers