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The Yam Rocket needs help (CIS troubleshooting) 200 1981

posted by  81242DLB21FCA on  Wed Apr 7 23:32 CST 2010
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last visit: Thu Oct 23 22:26 CST 2014
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Three things:

It does sound like an intermittent miss fire caused by a bad ignition component, which is aggravated by weather.

The miss fire could also be due to a lean mixture caused by a vacuum leak hence the low vacuum gauge reading.

I cannot remember if the EGR recirculates exhaust at idle or above idle. It may be necessary for proper idle. The EGR valve may not operate correctly with low vacuum.





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New The Yam Rocket needs help (CIS troubleshooting) [200][1976]
posted by  ktourian  on Wed Apr 7 18:17 CST 2010 >


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