Wez Posted February 7, 2009 Share Posted February 7, 2009 Hey All, Does anyone know what the two manifold pressure feeds to the power steering pump are used for, I guess for map compensation or something. Would it be OK to 'T' into one of these for my dump valve rather than running a long pressure feed to the back of the manifold like I have now? Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted February 7, 2009 Share Posted February 7, 2009 It's to allow an air path for idle up when the pump load gets high. Usually when the steering rack hits the end stop and you get a pressure spike. Lyndon. Quote Link to comment Share on other sites More sharing options...
bignum Posted February 7, 2009 Share Posted February 7, 2009 Ive got my bov t`d in wez no problems. Quote Link to comment Share on other sites More sharing options...
supra matt Posted February 7, 2009 Share Posted February 7, 2009 there for the speed sensitive steering . Quote Link to comment Share on other sites More sharing options...
Rich Posted February 7, 2009 Share Posted February 7, 2009 there for the speed sensitive steering . ^^ Yeah that. Quote Link to comment Share on other sites More sharing options...
b_have Posted February 7, 2009 Share Posted February 7, 2009 there for the speed sensitive steering . Are they? Quote Link to comment Share on other sites More sharing options...
b_have Posted February 7, 2009 Share Posted February 7, 2009 ^^ Yeah that. Are you sure? Quote Link to comment Share on other sites More sharing options...
Rich Posted February 7, 2009 Share Posted February 7, 2009 Not 100% charlie.(waits for tech guru to set me straight). Quote Link to comment Share on other sites More sharing options...
SteveR Posted February 7, 2009 Share Posted February 7, 2009 The speed-dependant level of power steering assist is based on an electronic signal. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 7, 2009 Share Posted February 7, 2009 The speed-dependant level of power steering assist is based on an electronic signal. Ok steve/charlie I stand well corrected. Quote Link to comment Share on other sites More sharing options...
SteveR Posted February 7, 2009 Share Posted February 7, 2009 Ok steve/charlie I stand well corrected. but to be fair I don't know what it does, mechanically, after the power steering has been told the speed. Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted February 7, 2009 Share Posted February 7, 2009 (edited) Not 100% charlie.(waits for tech guru to set me straight). He did in the second post The power steering stiffness is controlled by an ECU under the dash that takes a speed signal off the back of the Speedo head (this is why cheap speedo converters can screw the steering up unless the original KPH pulse is retain for these systems). This controls a pulse width modulated solenoid in the rack that PRV's off some of the pressure so reduce assistance. Lyndon. Edited February 8, 2009 by Nodalmighty (see edit history) Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 8, 2009 Share Posted February 8, 2009 The two pressure feeds are there to increase the idle speed of the engine when using the power steering, so it doesn't potentially stall or lower the idle to chug levels. They both go to a valve on the PAS pump. When the wheel is turned (not just when it hits the rack end stops ), the valve opens up and lets air through, bypassing the throttle body and giving the engine more air. -Ian Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted February 8, 2009 Share Posted February 8, 2009 They both go to a valve on the PAS pump. When the wheel is turned (not just when it hits the rack end stops ), the valve opens up and lets air through, bypassing the throttle body and giving the engine more air. -Ian Hair Splitter Lyndon. Quote Link to comment Share on other sites More sharing options...
Rich Posted February 8, 2009 Share Posted February 8, 2009 Hair Splitter Lyndon. Good call Lyndon,loving the sig by the way:d Quote Link to comment Share on other sites More sharing options...
Wez Posted February 8, 2009 Author Share Posted February 8, 2009 Thanks guys, I will use one for the BOV then Quote Link to comment Share on other sites More sharing options...
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