Idle Speed Issue - 1975 1.8L |
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Idle Speed Issue - 1975 1.8L |
telank |
Aug 29 2016, 10:00 AM
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#1
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Newbie Group: Members Posts: 8 Joined: 23-August 15 From: Indiana Member No.: 19,091 Region Association: Upper MidWest |
I'm in need of ideas to resolve an idle speed dilemma. My 914 is a 1975 1.8L which I bought about a year ago. It seems to be very stock and still has the L Jetronic FI system in place. Here is the challenge.... I have been using the process in the Haynes manual for setting idle speed. If I set the speed when the car is warm, the next time t is started cold it is difficult to start and will idle so slow it barely stays running. Once warmed up all is good. If I set the idle speed right after starting before it is up to temperature - after it does warm up - it will be idling at over 2,000 RPM. Outside of this issue the car runs good and strong. The plugs are perfect color - so no indication of too lean or rich mixture. Thanks for your thoughts or ideas!
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TheCabinetmaker |
Aug 31 2016, 09:01 AM
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#2
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I'm aware of the operation, and your assement is correct. My question was about amount of airflow between the two. (IMG:style_emoticons/default/huh.gif)
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telank |
Aug 31 2016, 09:12 AM
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#3
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Newbie Group: Members Posts: 8 Joined: 23-August 15 From: Indiana Member No.: 19,091 Region Association: Upper MidWest |
I'm aware of the operation, and your assement is correct. My question was about amount of airflow between the two. (IMG:style_emoticons/default/huh.gif) OK, sorry for the long-winded explanation, but good to know I am on-track (IMG:style_emoticons/default/smile.gif) I haven't seen the other valves first hand, but the valve on my car has a bore diameter of ~ .375" to .5" when fully open. How long it stays open would seem to be another major factor in how much airflow it allows. I hope to get mine reassembled within the next couple days and will test its operation before reinstalling it on the car. I can post how long it takes for the valve to close if you or others are interested? |
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