AAV and Decel Valve

[Vereeken]

Hi,

Quick one. I know some of you eleminated the AAV and DecelValve from the CIS system (82SC ROW, No Lambda).

My DecelValve is broken (high Idle, disconnecting the valve solves the problem).

Now to my question. When I take out the AAV (I see no use in this) and DecelValve do I plug the big airhoses or do I connect them to each other with a piece of tube (eg the AAV has to big air hoses. Do I plug them or let them flow into each other)?

Thanks for the assistance.

Michel

[mattduncan]

The AAV is used to allow additional airfow during cold start. It is critical to create a smooth choked idle. If it doesn't do anything with it bypassed(pluged) on a cool morning, then you have other problems with your CIS. I don't know if you want to bypass your AAV. You will have a very rough running car in the morning and may create backfire problems (very bad for airbox$$). If you do remove it, I'm not sure where you would connect tubes...just my thoughts.

[Vereeken]

True. But it only works for a couple of seconds during the start-up and my airbox is protected by a pop-off valve, although I know that that is no 100% guarantuee. The AAR (Regulator) is more important during cold start and he works fine (closing gently durig warm-up.)

I do have a WUR issue as well but he is now adjustable.

So Matt says plug it, anybody else? plug or connect through?

Thanks

Michel

[cmonref]

You said the AAR "only works for a couple of seconds during the start-up". But it is an important "couple of seconds" as it provides the air necessary to start the engine, then is closes immediately. It works during both COLD and WARM starts. If you remove it, you will have to use the throttle during start, and THAT has been shown to cause blown air boxes. I recommend you NOT remove the AAV.

[clevy70911T]

I removed and plugged the lines on both my AAV and decel valve. Just cracking the throttle a little works fine. If I can pick up a working decel valve, I have the option of putting it back in about 5 minutes work.

[Vereeken]

Brian, It is the AAV I am tryin to get rid off, not the AAR. I believe the WUR and AAR are crucial indeed.

Anyway. I plugged the Decel Valve. Big improvement, issue gone. I must say I prefer no Decel Valve , but that could be because perhaps mine never worked?

I will not pursue the AAV plug as my problems are solved.

Thanks for the inputs guys.

Michel

[RarlyL8]

As a general note I plugged all CIS component connections when the equipment was removed. There is no reason to bridge any gaps by connecting hoses.

Removal of any CIS equipment should occur only after you have a thorough understanding of the components function and any possible problems associated with its removal. The AAV is an example. On a 930 CIS engine no harm will come from its removal. There is no air box to blow up as in the N/A engines.

[Vereeken]

Yes indeed. Plugging and not connecting is the answer.

Thanks all for your support.

michel