Blue smoke & rough idle

ckbones

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Have 2002 7.3 Excursion with 142k miles. Just recently a problem started and it seems to be getting worse. When I start up the Ex blue smoke comes out of exhaust pipe and it idles rough. After a few minutes it clears up and runs like nothing happened. Recently after startup it has stalled after running a minute or trying to move and it took about 3 - 10 second cranks to restart and a large cloud was coming out of tail pipe. It cleared up after that and ran like nothing happened. I was 400 miles from home and once she started I didn't shut it off for 8+ hours.

What has me puzzled is she is not burning any oil or smoking when it is running fine.

I google the blue smoke and it says oil, but I'm not consuming oil and not smoking going 70 mph on the freeway.



Could this be something electrical with any of sensors that the Ex has? I'm puzzled. Appreciate all the help and advice offered. Thank you very much.
 

Strikefalcon

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I might not be correct. But blue smoke on start up might just be unburned fuel from being cold.
I see this every cold start.
 

DaveBen

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It is not likely anything electrical. Don't go messing with the electronics; you will regret it.
 

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