 high idle, 3000rpm idle |
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| slotty008 |
 Jul 24 2022, 03:29 PM
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#1
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Member  Group: Members Posts: 192 Joined: 11-November 15 From: Belgium Member No.: 19,349 Region Association: None 
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Hi guys ,
I just hope that someone could help us with the idle of my '75 2.0. I have the car for almost 7 years now and idle was always a little bit too high. We have been trying to correct this but it got worse instead of better. We changed the distributor to a 123 ignition, we changed all the vacuumlines, the AAR has been cleaned out and the idle screw is completely closed. The car starts at 1600rpm when cold and once it is warm it goes to 3000rpm and the idle stays there. The car pulls very well , a lot better better than when I just had it. (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) |
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| StarBear |
Jul 29 2022, 04:52 PM
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#2
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Advanced Member Group: Members Posts: 2,081 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States
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AARs are available. One sold here just a few days ago. Big thread on testing and maintaining the a few weeks ago. If can find, also indicates comparable Nissan part #.
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| Lockwodo |
Jul 29 2022, 05:14 PM
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#3
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Member Group: Members Posts: 210 Joined: 23-December 21 From: Santa Cruz, Californnia Member No.: 26,193 Region Association: Northern California
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QUOTE(StarBear @ Jul 29 2022, 03:52 PM)  AARs are available. One sold here just a few days ago. Big thread on testing and maintaining the a few weeks ago. If can find, also indicates comparable Nissan part #. (IMG:style_emoticons/default/agree.gif) best to replace the AAR. It progressively closes as an internal heating element warms up, versus an electric valve would be open or closed. You can also take an AAR apart and may be able to free up the mechanism. There's a you tube video on that. |
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| slotty008 |
Jul 30 2022, 02:05 AM
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#4
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Member Group: Members Posts: 192 Joined: 11-November 15 From: Belgium Member No.: 19,349 Region Association: None
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QUOTE(Lockwodo @ Jul 30 2022, 12:14 AM) QUOTE(StarBear @ Jul 29 2022, 03:52 PM) AARs are available. One sold here just a few days ago. Big thread on testing and maintaining the a few weeks ago. If can find, also indicates comparable Nissan part #. (IMG:style_emoticons/default/agree.gif) best to replace the AAR. It progressively closes as an internal heating element warms up, versus an electric valve would be open or closed. You can also take an AAR apart and may be able to free up the mechanism. There's a you tube video on that. I've seen the youtube video. I cleaned out the AAR a couple of months ago and it closed when I put current on it. My mechanic already took apart the AAR 2 times several weeks ago,apparently with no result. We'll see next week when the throttle is repaired. (IMG:style_emoticons/default/unsure.gif) (IMG:style_emoticons/default/unsure.gif) (IMG:style_emoticons/default/unsure.gif) |
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| wonkipop |
Jul 30 2022, 02:55 AM
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#5
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Advanced Member Group: Members Posts: 4,667 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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QUOTE(slotty008 @ Jul 30 2022, 02:05 AM) QUOTE(Lockwodo @ Jul 30 2022, 12:14 AM) QUOTE(StarBear @ Jul 29 2022, 03:52 PM) AARs are available. One sold here just a few days ago. Big thread on testing and maintaining the a few weeks ago. If can find, also indicates comparable Nissan part #. (IMG:style_emoticons/default/agree.gif) best to replace the AAR. It progressively closes as an internal heating element warms up, versus an electric valve would be open or closed. You can also take an AAR apart and may be able to free up the mechanism. There's a you tube video on that. I've seen the youtube video. I cleaned out the AAR a couple of months ago and it closed when I put current on it. My mechanic already took apart the AAR 2 times several weeks ago,apparently with no result. We'll see next week when the throttle is repaired. (IMG:style_emoticons/default/unsure.gif) (IMG:style_emoticons/default/unsure.gif) (IMG:style_emoticons/default/unsure.gif) yes @slotty008 - i've got a theory on these old AAVs and them seeming to work when you test them. i will qualify this by saying mine is a 1,8 L jet which has a different design of AAV mounted directly on the engine block. i cleaned and tested mine 2.5 years ago and yes it seemed to work. but what i have retrospectively thought is that i had it out of the car and i tested it on a bench. i now wonder if the cold engine block conducted cold into the body of the AAR means that when installed on the engine, and with an age weakened spring that it just can't warm up and close like it did new. so it sort of sits there. in fact in my case its jammed closed. i did have a really weird thing happen about 2 weeks ago when it actually worked. thats because here in australia we have been having record cold temps. somehow i think it was so cold that it caused the AAV to contract open past some point it had been sticking at - maybe due to a small ridge of corrosion. they are very fickle at this point in time half a century down the track. (IMG:style_emoticons/default/beerchug.gif) |
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Posts in this topic
slotty008 high idle Jul 24 2022, 03:29 PM
BeatNavy I'm going to say you have:
a. a vacuum line d... Jul 24 2022, 04:05 PM
porschetub
I'm going to say you have:
a. a vacuum line ... Jul 24 2022, 07:12 PM Lockwodo
Hi guys ,
I just hope that someone could help us ... Jul 24 2022, 04:38 PM wonkipop test the AAR after the car has completely warmed (... Jul 24 2022, 05:00 PM cgnj Broken intake gasket. Paid big dollars in the earl... Jul 24 2022, 05:40 PM Rand 3k? Definitely a huge vacuum leak. Timing can... Jul 24 2022, 06:07 PM emerygt350 Yeah, 3k is way too high for AAR as well. Get you... Jul 24 2022, 07:09 PM slotty008 Thank you guys for all the suggestions. I'm go... Jul 25 2022, 01:01 AM slotty008 My mechanic picked up the car this morning and thi... Jul 25 2022, 05:59 AM emerygt350
My mechanic picked up the car this morning and th... Jul 25 2022, 06:48 AM VaccaRabite Go find my thread on making a home-built smoke mac... Jul 25 2022, 07:37 AM dr914@autoatlanta.com if the thottle is completely closed then you have ... Jul 25 2022, 09:09 AM StarBear :popcorn: Jul 25 2022, 09:27 AM Rand George chimed in with nothing that wasn't alre... Jul 26 2022, 04:16 PM slotty008 Update,
This afternoon I got a call from my mechan... Jul 29 2022, 01:38 PM wonkipop
AARs are available. One sold here just a few days... Jul 29 2022, 08:26 PM brant Sounds like he suspects the bushings holding the b... Jul 29 2022, 05:23 PM StarBear Ahhh. Didn’t pick up on that. Thanks! Jul 29 2022, 10:14 PM slotty008 Update: I ordered a throttle body gasket and the r... Aug 9 2022, 12:57 PM DRPHIL914
Update: I ordered a throttle body gasket and the ... Aug 9 2022, 01:13 PM rjames Throttle body is likely worn to some degree (they ... Aug 9 2022, 01:33 PM slotty008 Update:
By the end of August we finally had some r... Oct 31 2022, 08:37 AM 76-914
Update:
By the end of August we finally had some ... Oct 31 2022, 09:03 AM Dave_Darling
BTW, do all 914's have the same throttle body... Oct 31 2022, 07:03 PM wonkipop
BTW, do all 914's have the same throttle bod... Nov 1 2022, 04:23 AM slotty008
BTW, do all 914's have the same throttle bod... Nov 1 2022, 04:39 AM slotty008 Now that I'm retired, I've finally found t... Mar 18 2023, 04:55 AM slotty008 RE: high idle Mar 18 2023, 04:57 AM VaccaRabite Mine leaked at the same place. Ended up replacing ... Mar 18 2023, 08:59 AM 76-914 Those can be re-bushed. Is there such a word? Any ... Mar 18 2023, 09:12 AM rjames
Those can be re-bushed. Is there such a word? Any... Mar 24 2024, 11:17 AM emerygt350 On my car the idle screw even leaks when fully clo... Mar 18 2023, 04:21 PM slotty008 After disassembling the AAR several times, I gave ... Mar 24 2024, 09:23 AM slotty008 Here it is installed.
Mar 24 2024, 09:25 AM slotty008 I've put a box on it to protect it. The bottom... Mar 24 2024, 09:28 AM slotty008 And this is the knob in the cockpit.
Mar 24 2024, 09:33 AM emerygt350
And this is the knob in the cockpit.
I like it... Mar 24 2024, 02:59 PM rhodyguy Do not overlook the stacked elbow. Kind of an obsc... Mar 25 2024, 11:18 AM |
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