Fluctuating idles 500rpm-2Krpm
08-10-2004, 03:05 PM
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Fluctuating idles 500rpm-2Krpm
Hi All,
I have a 78 Sc with smog pump (not connected) and it was idling fine until this weekend. The cold idling fluctuates from 500rpm to 2Krpm for about a dozen times and it just died. the car cannot be restarted until I let it sits for a few hours. It sounded like it was gasping for air and the exhaust smells rich. The car never had a chance to warm up and it started on the first try in the morning. So its not the hot or cold start problem. Has this happened to anyone before and tips on how to cure this problem is greatly appreciated. Thanks again. Andrew
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I have a 78 Sc with smog pump (not connected) and it was idling fine until this weekend. The cold idling fluctuates from 500rpm to 2Krpm for about a dozen times and it just died. the car cannot be restarted until I let it sits for a few hours. It sounded like it was gasping for air and the exhaust smells rich. The car never had a chance to warm up and it started on the first try in the morning. So its not the hot or cold start problem. Has this happened to anyone before and tips on how to cure this problem is greatly appreciated. Thanks again. Andrew
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08-11-2004, 06:56 PM
#3
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This symptom is usually caused by a rich mixture. Did it just start happening? Did the weather (Temp) change significantly? Did you just fix a vacuum leak? Check you CO mixture and reset it and this should correct the issue. Check you fuel pressure first to make sure everything is within spec first.
08-11-2004, 11:37 PM
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Noel,
Thanks for your help. The SC was experiencing other difficulties such as normal idling but died after I revved up the rpm and back fires alot. I though it may be a vaccum leak so I replaced a couple of vacum hoses. I have not gotten around to checking feul pressures yet, I just ordered the CIS pressure gauge and it's on its way. Andrew
Thanks for your help. The SC was experiencing other difficulties such as normal idling but died after I revved up the rpm and back fires alot. I though it may be a vaccum leak so I replaced a couple of vacum hoses. I have not gotten around to checking feul pressures yet, I just ordered the CIS pressure gauge and it's on its way. Andrew