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Aux Air Regulator resistance reading?

What should be the resistance reading on the cis aux air regulator

With the unit cold and unplugged I'm getting 17.5 ohms. Any idea on what the spec should be? Thanx L

Old 11-26-2013, 04:42 PM
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boyt911SC knows. What year?
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Old 11-26-2013, 04:47 PM
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I am not sure of the proper spec on an AAR but I just measured my spare that I tested and I know works. It's out of an 83 sc. It measured 17.4 ohms.
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Old 11-26-2013, 04:54 PM
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Auxiliary air regulator........

Quote:
Originally Posted by LCOX View Post
What should be the resistance reading on the cis aux air regulator

With the unit cold and unplugged I'm getting 17.5 ohms. Any idea on what the spec should be? Thanx L
LCOX,

Could you post the # on the AAR? It should read like this: 0-280-140-xxx. The last 3 digits will identify it from other AAR's. Do you have a -206, -209, or -219? Keep us posted.

Tony
Old 11-26-2013, 05:56 PM
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Aar-218........

Quote:
Originally Posted by lsf911 View Post
I am not sure of the proper spec on an AAR but I just measured my spare that I tested and I know works. It's out of an 83 sc. It measured 17.4 ohms.

Lou,

Your AAR should be -218 with resistance value of 33 +/- Ohms. Could you post the number please? Thanks.

Tony
Old 11-26-2013, 06:02 PM
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My 201 AAR is 34 ohms as well.
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Old 11-26-2013, 06:34 PM
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Another AAR........

Quote:
Originally Posted by timmy2 View Post
My 201 AAR is 34 ohms as well.
Dennis,

My reference booklet says AAR-209 for '78-'79 SC (USA or RoW). AAR-201 used in earlier CIS ('76-'77). I have two (2) '78 SC cars and both have AAR-209.

Tony
Old 11-26-2013, 07:15 PM
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Interesting, both of my AAR's are 201's, one that came with the car and one from a large port intake system I bought for parts.
Maybe I should throw a 209 on my car to see if there is a difference.
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Old 11-26-2013, 09:19 PM
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Hi Tony,

The AAR number is 0 208 140 209

Like I said, I applied 12V to it on the bench and watched it close completely.

I was told it is out of an 80 sc.
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Old 11-27-2013, 03:04 AM
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AAR spec........

The the average resistances (Ohms) measured were:

A A R............. Ohms
101................31 - 32
200................21 - 22
201................33 - 34
204................21 - 22
206................17 - 18

209.................17 - 18
218.................33 - 34

219.................17 - 18

The difference in heating resistance (Ohms) correlates to the time the valve closes during warm up phase. Higher resistance takes longer to close. So getting your CIS engine to run well means using the correct components and understand what you are doing.

A very good example is what an active member been doing with his 'customized CIS' engine using WUR, FD, etc. from different year/models and expect to optimize its performance. Unfortunately, the time and effort spent could have been minimal using the correct components. It has been going on for at least several months and counting. Sometimes you get lucky. But you can not rely on luck all time for troubleshooting your problem/s. It is not how hard you work but how smart you do it.

Tony
Old 11-27-2013, 06:00 AM
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Good stuff Tony.

I had no idea an 80 AAR was different than an 83 AAR. Looks like I bought the wrong type for my spare.
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Old 11-27-2013, 06:47 AM
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Well apparently I have the wrong aux air regulator on my 1976/77 911. My unit is 0 280 140 206. The resistance is 17.5 ohms.

Do I have the correct Fuel distributor and warm-up regulator for a 76-77 911?

My Fuel distributor is a 0 438 100 006 The warm up regulator is 0 438 140 033

Thanks for all the help with this. L
Old 11-29-2013, 09:26 AM
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Ferrari 400 - Bosch Downloads

Go here and open the Bosch Components Application tab.

Scroll down to the Porsche section and find your vehicle, I would say you have a 2.7 911 S not a euro 3 liter and all the components are their by part number

So for a 2.7 S the FD should be a 006 the WUR a 009 or a 033 and the aux air reg a 200 or 201

Note the 201 Aux air reg crosses over to Volvo I just bought 2 new in the box from a Volvo dealer in Oak Park Il. for $142.00 each, took about 2 weeks to get but that was the price, a lot better then the 700 plus that Porsche wants

There are a few 201s on ebay now if I recall at a good price as well, Just have to stay away from the Porsche name and the price comes waaaayyy down.

Wealth of Bosch info on this site, good one to book mark for our old CIS cars.
Old 11-29-2013, 12:11 PM
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Volvo Parts - Authentic OEM Volvo Parts direct from Volvo Parts Webstore | VolvoPartsWebstore.com

Bought from these guys if you need a 201 aux air reg to match up all your components
Old 11-29-2013, 12:17 PM
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Thanx for all this helpful info. I'll look into it. L
Old 11-30-2013, 07:27 AM
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Ok I have the correct aux air regulator now. It's a 0 280 140 200.

It also checks out with the proper ohms resistance at 21.5 ohms

Next question. I put 12 volts to the plug and over about a 3 minute period and the small round internal door closed but there is a small square cut out on the side of the internal door that did not close.

Air can still be blown through the unit but not as freely. Shouldn't these close off the air supply completely when heated? L
Old 12-05-2013, 02:11 PM
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Mine doesn't appear to close completely.. It closes over a period of a few minutes with 12 VDC applied. There is a "V" shaped cutout that is still visible when the AAR is warmed up.
Old 12-05-2013, 03:28 PM
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AAR test........

Quote:
Originally Posted by LCOX View Post
Ok I have the correct aux air regulator now. It's a 0 280 140 200.

It also checks out with the proper ohms resistance at 21.5 ohms

Next question. I put 12 volts to the plug and over about a 3 minute period and the small round internal door closed but there is a small square cut out on the side of the internal door that did not close.

Air can still be blown through the unit but not as freely. Shouldn't these close off the air supply completely when heated? L

LCOX,

Place the AAR in an over at 170°F-180°F for 5 to 10 mins. (max) and inspect if the slot opening did close. I'll test my AAR-200 and post the result. Three (3) to 4 mins. is the typical closing time for these AAR's.

Tony
Old 12-05-2013, 04:49 PM
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Test result.........

Quote:
Originally Posted by LCOX View Post
Ok I have the correct aux air regulator now. It's a 0 280 140 200.

It also checks out with the proper ohms resistance at 21.5 ohms

Next question. I put 12 volts to the plug and over about a 3 minute period and the small round internal door closed but there is a small square cut out on the side of the internal door that did not close.

Air can still be blown through the unit but not as freely. Shouldn't these close off the air supply completely when heated? L

LCOX,

Did a quick oven test for AAR @ 170°F for 10 mins. while wifey was busy decorating the X'mas tree. The slide valve closed but the small square slot was still visible. So we have the same result like others. HTH.

Tony
Old 12-05-2013, 07:28 PM
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911 07.77 - 07.83 930.xx
6 cyl. 3.0L
K-Jetronic
Injector Valve 0 437 502 004
Fuel Pump 0 580 254 984 > 7/79
0 580 254 053 8/79 >
Air Flow/Mass Sensor 0 438 120 070 > 6/80
0 438 120 149 7/80 >
Fuel Filter F5021 > 8/80
Fuel Filter F5907 9/80 >
Fuel Distributor 0 438 100 031 > 6/80
0 438 100 097 7/80 >
Cold Start Valve 0 280 170 409
Fuel Accumulator 0 438 170 009 > 6/79
0 438 170 031 7/79 >
Warm Up Regulator 0 438 140 045 > 1/80
0 438 140 089 2/80 >
Auxiliary Air Valve 0 280 140 201

Hmmm, looks like the 201 AAR is correct for my '78 from the info Tony directed me to...

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Old 12-05-2013, 09:33 PM
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