Turbo Control Actuator question
Thread Starter
Joined: Feb 2007
Posts: 442
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From: Tallahassee, FL
Turbo Control Actuator question
So I just tested the turbo control actuator and found that on the vacuum side everything checks out ok. Apply vacuum and the arm starts to move. However, when trying to pressurize the other side, I discovered that it won't hold any psi. I verified this using a Mityvac connected directly to the actuator. My question is...how much would this affect the performance? And yes, I'm having boost pattern issues and wondering how much this would contribute to it.
Thanks,
Steve
Thanks,
Steve
Might want to check the tests in the shop manual, I can't remember how it's supposed to react. But, in general, the TCA's are pretty reliable.
I had transition problems for a while where the TCA wouldn't engage. The TCA solenoid that's bolted to the air control valve was the culprit, replaced it and all was good.
Dale
I had transition problems for a while where the TCA wouldn't engage. The TCA solenoid that's bolted to the air control valve was the culprit, replaced it and all was good.
Dale
The Turbo Control Solenoid / Actuator is one of the more complicated actuators as it requires both vacuum and pressure to operate properly. This actuator is controlled by two solenoids, (both are wired together to the one ECU output) one solenoid applies pressure to one side of the actuator and the other applies vacuum to the other side of the actuator. With pressure on one side and a vacuum on the other side of the actuator, the speed of the actuator is improved. A typical problem is loss of Secondary boost in 1st or 2nd gear at 4,500 RPM, but reliable operation in other gears. This points to one side of the Turbo Control Actuator not getting it's pressure/vacuum, so it will still operate but not quickly enough.
http://www.autosportracetech.com/RX-...leshooting.htm
