 Troubleshooting question, Hot idle '73 2.0 too high |
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| Last930 |
 May 9 2015, 08:16 PM
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#1
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Member  Group: Members Posts: 60 Joined: 15-September 14 From: Illinois Member No.: 17,905 Region Association: Upper MidWest  |
My '73 2.0 idles beautifully when cold - right at 950-1,000 rpm. Once hot however it idles way to fast - around 2,000-2500 rpm. It runs great other than that. Any suggestions on troubleshooting?
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| boxsterfan |
May 9 2015, 11:15 PM
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#2
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
Auxilliary Air Regulator sounds stuck open. That also sounds like too low of an idle for a cold start.
Just unplug the AAR hose from the intake plenum and block off the hose with your thumb. If the idle drops, you need a new AAR. They don't make them new anymore, but you can find a good used one here. |
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| Last930 |
May 10 2015, 07:44 AM
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#3
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Member Group: Members Posts: 60 Joined: 15-September 14 From: Illinois Member No.: 17,905 Region Association: Upper MidWest |
QUOTE(boxsterfan @ May 10 2015, 12:15 AM)  Auxilliary Air Regulator sounds stuck open. That also sounds like too low of an idle for a cold start. Just unplug the AAR hose from the intake plenum and block off the hose with your thumb. If the idle drops, you need a new AAR. They don't make them new anymore, but you can find a good used one here. Can someone direct me to a picture of these parts? My manual doesn't have a clear photo of the decel and aar. Thanks, Dave |
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Posts in this topic
Last930 Troubleshooting question May 9 2015, 08:16 PM
r_towle Clean your distributor advance plates. May 9 2015, 08:22 PM
Last930
Clean your distributor advance plates.
Distribut... May 9 2015, 09:24 PM brant As a test. Unplug one of the large decel valve ho... May 9 2015, 08:24 PM toon1 It could be the dizzy( as mentioned)
. It can al... May 9 2015, 08:28 PM r_towle It idles high when hot.....
Air leaks hot and cold... May 9 2015, 08:31 PM brant
It idles high when hot.....
Air leaks hot and col... May 9 2015, 08:44 PM somd914 Decel valve is on passengers side near the Manifol... May 10 2015, 08:00 AM Last930 Warmed the car up well and took it for a 10-15 mil... May 10 2015, 08:48 PM |
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