Does your 7.3L smoke?? - Ford Powerstroke Diesel Forum
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  #1  
Old 04-05-2012, 01:50 PM
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Does your 7.3L smoke??

Just curious if it is just my truck or if most everyone's 7.3L trucks smoke when you start them. I have a 2003, cc 4x4 7.3L 142k miles t, I dont have much done to the truck motor wise other than an edge evolution(always run on tow mode60hp or race at 80hp) a walker btm muffler, hutch and harpoon mod and a s&b cold air intake. I put the programer on the truck last summer and never noticed any smoke when starting in warm weather. Once it started getting colder the truck will smoke white smoke on cold starts. AT 40to60 degress it only smokes for maybe 30sec, between 30 and 40degrees maybe around a min and anything below30 to 0 degrees it will smoke for a couple minunites. If i have drove the truck several hours before starting it will never smoke.

I was never really concerned until i kinda started thinking about buying a new truck. I am the type of person i dont like screwing anyone so just want to make sure this is normal or if there might be a problem. I have not tried starting it back on the stock mode so not sure if that would make a differance. I have never hate any check engine/idle/acceleration or any issues at all in the truck. I run rotella full synthetic and change every 5k miles never low on oil.

I pretty much figured it is just unburnt fuel being burned until the motor is at proper operating temp. Am i correct or should there be a concern???
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Old 04-05-2012, 03:53 PM
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The big question is what color is the smoke?
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Old 04-05-2012, 04:18 PM
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smoke looks to be white/grayish in color. I know i am also not running low on antifreeze so i know its not burning that at all.
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Old 04-05-2012, 04:25 PM
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Mine does the same thing it only smokes on start up when it's cold for like 10 sec


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Old 04-05-2012, 04:28 PM
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Yeah, mine does when its below freezing and clears up after a few seconds.
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Old 04-05-2012, 04:40 PM
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my dads did the same thing when it was cold
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Old 04-05-2012, 04:43 PM
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This is completely normal, dont worry about it.
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Old 04-05-2012, 05:24 PM
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Completely normal if you have a bad glow plug.

I had the exact same thing and found 2 bad glow plugs. Replaced them and not one puff of smoke now!

I was quite suprised at how much easier it starts too!
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Old 04-05-2012, 08:02 PM
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Yeaup, Like a Choo Choo
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Old 04-05-2012, 08:12 PM
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I get no smoke on startup even down to 5-10* and not plugged in. I have good glow plugs, harnesses and a stancor relay. Yes the smoke is unburned fuel that your truck "should" be burning if it was functioning properly. My truck has 190k on it with all original injectors. Will it hurt anything if it smokes on startup ? No
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