missing till warmed up - Ford Powerstroke Diesel Forum
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Old 01-30-2012, 02:36 PM
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missing till warmed up

I have a 99 7.3 i have read and read on this subject and didnt really find what mine is doing. i have replaced glow plugs and relay
it will miss when i start it in the morning or if it sits all day the warmest it has been is 60 and it will still do it. if i plug it in it will start and run good it will surge when not plugged in and it blows black smoke when it surges. no ses light. not much power when missing. any ideas or a point twords the right topic in the forum? thanks Bryan
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Old 01-30-2012, 02:50 PM
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There is a sticky or two talking about testing the GPs, GPR, and general cold starting stuff. In the 7.3 sections.
How new is the oil, filter, and fuel filter? If you don't understand the HEUI system, read up a quick bit on it. It'll explain why oil matters so much.
So once it's warm, it's perfect?
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Old 01-30-2012, 02:51 PM


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Check your fuel filter, and make sure its clean. Also make sure that he connections on your valve cover harnesses are good and tight, sometimes an injector can stick and cause miss fire. Once it gets warmed up, it will go away if its only an injector issue, and not a wiring or fuel issue.

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