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Unread 01-14-2014, 05:32 AM   #31
Sherms-CJ7
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1982 CJ7 
 
Join Date: Mar 2010
Location: Lovettsville, VA
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Quote:
Originally Posted by Sherms-CJ7 View Post
Hey Jason,

I think leaving the PCV valve on the valve cover open, might disable the Air Door and/or Heat Door of the snorkel on the air cleaner. Though I am not certain ... mine are not working properly, but I actually have not connected the PCV line on my rig as I don't have the filter or that fitting. I'm not sure if mine not working was the cause or ... if they just are just broke; need to do some more troubleshooting myself.

Sorry for the late reply ...


John
You know, I think this is wrong. Thinking about it some more, having an open PCV line in the air-cleaner should not be related to Air Door and/or Heat Door not working properly. Looking at the schematics, separate vacuum lines control those doors ... I think I have problems with my air clearner.

Again going be to schematics, it looks like I may need to replace one or 2 of the following TAC vacuum motor, TAC temperature sensor, or evaporative system vacuum motor. Has anybody else had similar problems who can maybe point me in a direction for how to deal with that one? Can you even replace the TAC temperature sensor? Where to find one?

Thank you as always -
John

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Unread 01-14-2014, 05:48 AM   #32
Matt1981CJ7
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John,

You are correct. The PCV line has nothing to do with the TAC system.

The TAC vacuum motors are easy to check. Just stick a vacuum pump on the hoses and see if the doors open.

If the vacuum motors are OK, hook them up per below. Then, start the engine and look down the breather housing as the engine warms. The inner most trap door should open as soon as the engine starts. The outer door should open gradually as the engine warms up. If it doesn't then the temp sensor (thermal switch) or the delay valve is bad.

Hope this helps,

Matt
tacplumbing.jpg  
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Unread 01-14-2014, 05:50 AM   #33
Sherms-CJ7
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1982 CJ7 
 
Join Date: Mar 2010
Location: Lovettsville, VA
Posts: 663
Quote:
Originally Posted by Matt1981CJ7 View Post
John,

You are correct. The PCV line has nothing to do with the TAC system.

The TAC vacuum motors are easy to check. Just stick a vacuum pump on the hoses and see if the doors open.

If the vacuum motors are OK, hook them up per below. Then, start the engine and look down the breather housing as the engine warms. The inner most trap door should open as soon as the engine starts. The outer door should open gradually as the engine warms up. If it doesn't then the temp sensor (thermal switch) or the delay valve is bad.

Hope this helps,

Matt
Hi Matt!!

That helps big time - Thank you again ... especially for being so quick to respond!!

At this point, I think I owe you quite a few beers ...

Best regards -
John
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Unread 01-14-2014, 05:54 AM   #34
Matt1981CJ7
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No worries. The vacuum systems on these old heaps is kinda my forte.

The electrical, on the other hand, not so much.

Matt
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