2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

actuators controversy

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Old Mar 2, 2004 | 07:31 PM
  #1  
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From: TEXAS
actuators controversy

I have read every where here that the actuators that activate the 5/6 ports are operated by back pressure from the exhaust (86gxl)....the haynes manual says that these actuators are operated by pressure from the air pump.
So what is it????
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Old Mar 2, 2004 | 07:54 PM
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From: Rohnert Park CA
You may wish to search before posting, as this has been covered quite a few times before. The search function is found in the upper right hand corner of the page.

Both are correct.

The 84-88 13B used exhaust back pressure to open the aux ports.

The 89-91 13B used air pump pressure to open the aux ports and VDI.
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