 Idle fluctuation, Rpm between 1000 and 2000 |
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| SWH |
 Feb 5 2025, 11:18 PM
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#1
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Newbie  Group: Members Posts: 16 Joined: 27-April 24 From: Arizona Member No.: 28,084 Region Association: Southwest Region  |
Completed rebuild on 1974 914 2.0 L. All fuel and vacuum lines are also new. Engine idle varies between 1000 and 2000 rpm every few seconds what could cause this?
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| 914sgofast2 |
Feb 6 2025, 02:18 PM
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#2
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Senior Member Group: Members Posts: 778 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
You have an uncontrolled vacuum leak somewhere downstream of the throttle body. That's why it has a "hunting" idle. Check the rubber elbow for cracks, as well as check the plenum seams for leaks using propane or carb cleaner.
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| ctc911ctc |
Feb 6 2025, 02:47 PM
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#3
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Senior Member Group: Members Posts: 1,275 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States 
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QUOTE(914sgofast2 @ Feb 6 2025, 03:18 PM)  You have an uncontrolled vacuum leak somewhere downstream of the throttle body. That's why it has a "hunting" idle. Check the rubber elbow for cracks, as well as check the plenum seams for leaks using propane or carb cleaner. (IMG:style_emoticons/default/agree.gif) Plenum cloth connectors got me before. |
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Posts in this topic
SWH Idle fluctuation Feb 5 2025, 11:18 PM
brant Did you rebuild the throttle body?
Most of them a... Feb 6 2025, 07:34 AM
ctc911ctc
Did you rebuild the throttle body?
Most of them ... Feb 6 2025, 07:59 AM
worn
Did you rebuild the throttle body?
Most of them... Feb 6 2025, 06:46 PM brant
[quote name='ctc911ctc' post='3190563' date='Feb ... Feb 7 2025, 03:55 PM brant Dup Feb 7 2025, 04:12 PM 76-914
[quote name='ctc911ctc' post='3190563' date='Feb... Feb 7 2025, 05:07 PM TJB/914 [quote name='brant' date='Feb 6 2025, ... Feb 6 2025, 04:21 PM emerygt350 That is interesting, there are not any feedback me... Feb 6 2025, 11:29 AM VaccaRabite I'm going to go with throttle body as the prim... Feb 6 2025, 01:59 PM rhodyguy Known as ‘hunting’? Up and down? Examine the s... Feb 6 2025, 02:06 PM emerygt350 Hunting normally isn't the result of a vacuum ... Feb 6 2025, 06:53 PM brant I hope you’re doing GREAT. Kent
It’s been a w... Feb 7 2025, 07:01 PM emerygt350 I would go with a leak like brant described if it ... Feb 7 2025, 09:35 PM saigon71 A hunting idle can also be caused by a lean idle m... Feb 8 2025, 06:59 AM emerygt350
A hunting idle can also be caused by a lean idle ... Feb 8 2025, 11:06 AM JamesM
A hunting idle can also be caused by a lean idle ... Feb 10 2025, 10:28 PM SWH Thank for all the feedback on the idle searching p... Feb 9 2025, 12:53 PM ctc911ctc Beautiful Paint Job - do you have a color number? ... Feb 9 2025, 02:47 PM emerygt350 remind me, was it modded at all? I bet you are ju... Feb 9 2025, 02:32 PM Fazasport Can anyone reccomend someone who is currently rebu... Feb 10 2025, 04:13 PM emerygt350
Can anyone reccomend someone who is currently reb... Feb 10 2025, 05:53 PM steuspeed I had a hunting idle and it went away when I repla... Feb 10 2025, 11:55 PM |
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