 Idle starts jumping around, After 1 or 2 minutes of running |
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| championgt1 |
 May 28 2010, 10:59 PM
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Don't embarrass me Filmore!  Group: Members Posts: 2,680 Joined: 3-January 07 From: Tacoma, Washington Member No.: 7,420 Region Association: Pacific Northwest  |
Car is a 74 djet. When I first start it cold it idles steady at around 1200rpm. After a minute or two it starts to jump back and forth from around 500rpm to 1200rpm or so. Any suggestions on what to look for? CHT? AAR?
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| Bleyseng |
May 30 2010, 07:30 AM
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
first of all you must set the idle mix when the engine is hot and after 10 minutes of running. Most people change the idle mix when the car is still in warm up cycle and then never get it right!
After you get a nice idle mix and rpm setting, about 950 rpms, then see what happens the next time you drive it. Yes, it should start up and idle at 1200-1500 rpms at first and usually there is some hunting as the engine warms up which is atleast 5 minutes of driving... If it still is hunting alot check the hoses to vacuum leaks etc and finally install a CHT spacer to slow down the response of the CHT. |
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Posts in this topic
championgt1 Idle starts jumping around May 28 2010, 10:59 PM
dangrouche i got the same problem; it believe its a vacuum le... May 28 2010, 11:26 PM Bleyseng This is the way the idle gets warm, it jumps aroun... May 29 2010, 05:15 PM detoxcowboy
Car is a 74 djet. When I first start it cold it i... May 29 2010, 06:44 PM
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