charge control actuator
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From: reno nevada
charge control actuator
I was trying to do the solenoid test http://www.rx7.voodoobox.net/ and i found my charge control actuator is not holding pressure in chamber b, it should should it not?
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From: reno nevada
Originally Posted by autosportracetech.com
Note, that the vacuum supply is from the Vacuum Chamber, thus leakage of the one-way check valve for the Vacuum Chamber will result in Primary boost applied on both sides of the actuator resulting in this valve opening when it should not, dumping Primary boost through the Charge Relief , Secondary Turbo and out the Charge Relief Valve. Another symptom of a leaky Vacuum Chamber one-way check valve is a loss of boost that is restored if the throttle is let off, (re-charging the Vacuum Chamber from engine vacuum) then quickly re-applying throttle results in boost.
So, you're only getting 5psi overvall, or just 5psi after transition?
I do think that chamber B is supposed to hold pressure. Since it's the pressure equalization between A and B that causes the charge control to open.
I do think that chamber B is supposed to hold pressure. Since it's the pressure equalization between A and B that causes the charge control to open.
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From: reno nevada
5 psi overall, in this video on the solenoid test his holds pressure http://www.rx7.voodoobox.net/howto/s...noid_small.avi
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From: sydney
From a test of three out of front cuts - and a 100% failure rate, found the charge control actuators typically develop leaky diaphragms....one being so bad, you couldn't pump fast enough to stop the butterfly from closing almost immediately. As to whether that's one of the contributing factors in your boost problem, won't hazard a guess there. A test of the check valve - and charge relief solenoid I'd suggest, should be simple enough without major dismantling though.
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