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| High Idle | |
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| Tweet Topic Started: Oct 5 2009, 11:57 AM (1,985 Views) | |
| fixhercar | Oct 5 2009, 11:57 AM Post #1 |
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Fresh Fish
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Hello, I am having a high idle issue. 2000 rpm when cold. After warm up, it "Hunts" from 1750 to 2250 rpms, unloaded. It drives fine but acts up when stopped. It is the 1 liter, manual, w/unibody injection. It has new plugs and Dis. Cap. The Idle Adjust screw does not lower the rpms. ???? I hope this is a easy/cheap fix !!!! Thank you for your time. |
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| mwebb | Oct 5 2009, 12:23 PM Post #2 |
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FOG
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in descending order of probability .... 1; Vacuum leak from rotted vacuum line or brake booster line 2: incorrectly adjusted throttle plate or throttle cable a ; which holds the throttle open letting in extra air and b ; causing the closed throttle switch to never close , so idle circuit never switches to "ON" 3; TPS throttle position sensor is incorrectly adjusted or non functional , or a: TPS ground is bad which elevates closed throttle switch value AND TPS value so idle circuit never switches to "ON" b; TPS value closed throttle should be about .5 volts , TPS ground MUST be within 50mv or .050 volts or less from battery negative with engine running hi beams on and heater blower maxed 4; ignition timing is way off should be around 8 degrees btdc with the little pins jumpered 5; failed IAC idle air control |
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| Bad Bent | Oct 5 2009, 08:19 PM Post #3 |
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Facetious Educated Donkey
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Welcome to the forum, fixhercar! What mwebb said.
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| Woodie | Oct 6 2009, 06:52 AM Post #4 |
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Idle Control Motor or Idle Air Controller, they all do it eventually. I've heard that disconnecting the vacuum hose and plugging it will settle things out. |
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| Metro_caon | Jan 21 2010, 05:46 AM Post #5 |
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Elite Member
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I had the same problem... when I got my metro, I noticed the hose plugged as WOODIE suggests. As soon as I unplugged it and connected it correctly under the air cleaner connection, the high idle started Does any body know how to check the "Idle Control Motor or Idle Air Controller" or whatever could be involved here causing the high idle and... What happens if I just plug it as suggested? It will solve the high idle problem but I know it will hurt something else. The idle adjustment screw does not lower the rpm. |
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| pancakeron | Jan 21 2010, 01:37 PM Post #6 |
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New Member
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save yourselves time and trouble, scroll up to "post #2" of this thread, follow the suggestions as listed... oh, snap! here's post#2 right here:
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1:55 PM Jul 11