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schoonerman
Samba Member
Joined: May 14, 2008
Posts: 244
Location: vancouver
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 Posted: Tue Apr 15, 2014 9:31 am Post subject: AFM allen screw way out |
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When checking the AFM I found that the allen adjusting screw to be 13 turns out.
Could this be the reason that it failed aircare on idle?
I also found the plugs to be white on the electrodes
The van runs good otherwise
Any help
Thanks
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87 Westy/Vanagon |
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insyncro
Banned
Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Tue Apr 15, 2014 9:36 am Post subject: |
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| 1.5 revs out from seated is the stock position when new. |
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Ahwahnee
Samba Member
Joined: June 05, 2010
Posts: 9810
Location: Mt Lemmon, AZ
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| Posted: Tue Apr 15, 2014 1:15 pm Post subject: |
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| Mine (84 Digijet) appeared to be untouched when I removed the plug -- it was screwed all the way in. |
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insyncro
Banned
Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Tue Apr 15, 2014 2:33 pm Post subject: |
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1.5 on the 2.1s
His sig says 87 Westy  |
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sea_sick
Samba Member
Joined: July 21, 2012
Posts: 113
Location: West Coast
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| Posted: Tue Apr 15, 2014 3:43 pm Post subject: |
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| Ahwahnee wrote: |
| Mine (84 Digijet) appeared to be untouched when I removed the plug -- it was screwed all the way in. |
Same here on a 90. |
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sea_sick
Samba Member
Joined: July 21, 2012
Posts: 113
Location: West Coast
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| Posted: Tue Apr 15, 2014 3:43 pm Post subject: |
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| Ahwahnee wrote: |
| Mine (84 Digijet) appeared to be untouched when I removed the plug -- it was screwed all the way in. |
Same here on a 90. |
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schoonerman
Samba Member
Joined: May 14, 2008
Posts: 244
Location: vancouver
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| Posted: Tue Apr 15, 2014 10:02 pm Post subject: |
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Decided to screw it in to the stated 1 1/2 turns out from the bottom, no noticeable change in engine, took her for a drive and still runs good
Hope I haven't changed the emissions.
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insyncro
Banned
Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Wed Apr 16, 2014 4:34 am Post subject: |
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| If you are looking for better emissions numbers, you need to have the exhaust analyzed while making changes. |
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Gauche1968
Samba Member
Joined: April 13, 2006
Posts: 1518
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| Posted: Wed Apr 16, 2014 8:11 am Post subject: |
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| insyncro wrote: |
1.5 on the 2.1s
His sig says 87 Westy |
What is it on 1.9s?
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1984 Vanagon GL
1984 Vanagon Westy |
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insyncro
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Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Wed Apr 16, 2014 8:17 am Post subject: |
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| Gauche1968 wrote: |
| insyncro wrote: |
1.5 on the 2.1s
His sig says 87 Westy |
What is it on 1.9s? |
No clue.
I don't own any brand new 1.9 AFMs to check. |
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61Scout
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Joined: November 06, 2011
Posts: 1297
Location: Shoreline/Yakima WA
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schoonerman
Samba Member
Joined: May 14, 2008
Posts: 244
Location: vancouver
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| Posted: Wed Apr 16, 2014 12:48 pm Post subject: |
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| 61Scout wrote: |
Emissions can be tricky. OP, do you have a print out of the fail sheet? If so, post it up with a picture so we can see. Chances are you many have to address other components beyond messing with the AFM. Have you checked your O2, throttle body, cracks in the boot? etc.
-Kevin |
I've checked all vacuum lines, injector o rings, charcoal canister, throttle body and rubber boot but not the o2 sensor
For the emissions sheet, please check my other post...... failed aircare, bad idle.
I thought I had found the idle fail problem with the AFM screw being way out, that's why I asked if this could be the problem
I have booked a VW shop for next Wed to have them check with their sniffer and make adjustments etc.
Thanks
Mike
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tschroeder0
Samba Member
Joined: April 14, 2008
Posts: 2096
Location: Boulder CO
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| Posted: Wed Apr 16, 2014 7:18 pm Post subject: |
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| if you search AFM signal testing and AFM mixture setting you will get everything you need to know about messing with that box o fun. |
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