Alt air will not stay closed

[c1tice]

In my 1981 M20K the alt air will not stay closed. It works it way open about every 2 minutes. It is worse the higher and faster I go. Anyone have any suggestions that don’t involve duct tape?

[201er]

2 hours ago, c1tice said:

In my 1981 M20K the alt air will not stay closed. It works it way open about every 2 minutes. It is worse the higher and faster I go. Anyone have any suggestions that don’t involve duct tape?

Check the filter and intake for obstruction?

[Schllc]

Is it actually open, or is it just the indicator saying it’s open?

[Pinecone]

IIRC, there is a magnetic latch to keep it fully closed. 

Check that.

[c1tice]

11 hours ago, Schllc said:

Is it actually open, or is it just the indicator saying it’s open?

It is opening. The knob slides out and MP changes. 

[kortopates]

This often happens when the induction boot isn’t attached properly and the duct/boot causes an obstruction. Or the magnet is out of adjustment - but the later is rare.


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