 Slightly fast idle - suspect AAV, Am I right? |
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| gturner008 |
 May 14 2020, 06:29 AM
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Member  Group: Members Posts: 127 Joined: 21-April 20 From: Toronto Member No.: 24,163 Region Association: Canada  |
Owned 76 2.0 for two weeks now.
Lots of little jobs completed. But I have an idle that’s 1100 rpm. The idle screw is virtually fully in. I suspect the AAV is stuck slightly open when engine hot. If I pull the tube from the air intake and put my thumb over it, the revs drop to about 600 rpm. Everything else is good. All hoses correct and no leaks. Am I right in thinking the AAV should close up completely? If it’s a stuck AAV, any recommendations for getting it freed up? Cheers. Gary |
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| windforfun |
May 14 2020, 09:57 AM
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Advanced Member Group: Members Posts: 2,085 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None 
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What's the AAR or AAV?
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| Dave_Darling |
May 14 2020, 12:22 PM
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#3
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914 Idiot Group: Members Posts: 15,308 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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QUOTE(windforfun @ May 14 2020, 08:57 AM)  What's the AAR or AAV? Auxiliary Air Regulator (or Valve). Gives you a higher idle when the engine is cold. Serves as a leak from upstream of the throttle valve to downstream of it; is open when cold and closes when it heats up as the engine runs or as the small heating element in it warms up. On D-jet cars (1.7, 2.0) it lives to the front-left of the Intake Air Distributor (the plenum part of the intake manifold). I think the location is similar on the L-jet 1.8s, but I don't remember. --DD |
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Posts in this topic
gturner008 Slightly fast idle - suspect AAV May 14 2020, 06:29 AM
BeatNavy Fast idle is normally caused by vacuum leak and/or... May 14 2020, 06:46 AM gturner008 Many thanks. The drop to 600 rpm I think could eas... May 14 2020, 08:05 AM ClayPerrine :wttc:
Glad you are here.
:ttiwwp:
We wan... May 14 2020, 08:45 AM gturner008 Work in progress May 14 2020, 09:52 AM
pete000 Sure doesn't take much of a leak to reek havoc... May 14 2020, 11:12 AM gturner008 Update.
Removed AAV or ARR, cleaned. Put 12v thr... May 14 2020, 12:33 PM euro911 IIRC, there's two idle adjustment locations on... May 14 2020, 12:41 PM BeatNavy Great job! You may have a small vac leak some... May 14 2020, 12:42 PM
gturner008 Thanks Mark and Rob,
I'll give the ECU a twea... May 14 2020, 01:06 PM |
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