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Old 10-07-2017, 06:18 PM   #1
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Unsteady idle when cold start

When I start my car focus in the morning it idles up and down It never use to do that there's not check engine light I had a new motor professionally installed and I also still have the hanging revs and idle coming to a stop


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Old 10-08-2017, 07:54 PM   #2
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Any chance of miss fire?
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Old 10-09-2017, 04:40 AM   #3
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Could be a lot of things, how old are matinence items? If not too bad I'd be checking for a vacuum leak
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Old 10-09-2017, 09:24 AM   #4
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Motor only has 90000 miles new plugs and wires the mechanics at my work put the motor in they smoked it and the only thing they found was a missing clamp on the coupler for the intake manifold maybe there's something we are missing
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