 AAR Testing, While on car |
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| saigon71 |
 Jun 2 2016, 01:51 PM
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#1
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Senior Member  Group: Members Posts: 1,998 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region 
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My car started suddenly started running rough with a low idle. I had to move the idle air bypass screw all the way out to keep it from stalling. Verified timing and dwell are within spec yesterday.
I'm wondering if the AAR is stuck closed, causing a rich condition. Consulting the PBanders D-jet bible, I saw this procedure for testing to see if the AAR is stuck closed: Stuck closed: Poor running (low idle) after cold start. Check on cold engine by removing the input hose immediately after starting. If you do not feel suction, the regulator is stuck closed. See below for rebuild and rejuvenation procedures. My question is, which one is the input hose? One hose goes to the cylinder head and the other to a nipple on the air cleaner. Thanks! |
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| SLITS |
Jun 2 2016, 01:55 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
QUOTE(saigon71 @ Jun 2 2016, 12:51 PM)  My car started suddenly started running rough with a low idle. I had to move the idle air bypass screw all the way out to keep it from stalling. Verified timing and dwell are within spec yesterday. I'm wondering if the AAR is stuck closed, causing a rich condition. Consulting the PBanders D-jet bible, I saw this procedure for testing to see if the AAR is stuck closed: Stuck closed: Poor running (low idle) after cold start. Check on cold engine by removing the input hose immediately after starting. If you do not feel suction, the regulator is stuck closed. See below for rebuild and rejuvenation procedures. My question is, which one is the input hose? One hose goes to the cylinder head and the other to a nipple on the air cleaner. Thanks! That's not the AAR hose. You are playing with the antibackfire valve. The AAR hoses come from the aircleaner and then to the plenum. |
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| saigon71 |
Jun 2 2016, 03:09 PM
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#3
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Senior Member Group: Members Posts: 1,998 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region
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Thanks Ron. (IMG:style_emoticons/default/smile.gif)
Pulling the Air cleaner off made things clearer (I think). Am I correct in thinking that the "input" as described by PBanders is the hose on the right that connects to the air cleaner?  |
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| brant |
Jun 2 2016, 03:16 PM
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#4
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914 Wizard Group: Members Posts: 11,622 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains
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correct
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