White smoke
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White smoke
I recently purchased a 2000 superduty 7.3. I took the great information on this site and changed the injectors myself saving a pile of money. Thanks guys.
I now am noticing that when I start the truck up it puffs white(ish) smoke until it is warm. The truck also takes allot of cranking to get started. I replaced the starter and both batteries but it is still slow to start. All the glow plugs checked out when I did the injectors. This truck has had a tough life by the look of it.
What does white smoke mean, and what are the common symptoms of hard starting?
I now am noticing that when I start the truck up it puffs white(ish) smoke until it is warm. The truck also takes allot of cranking to get started. I replaced the starter and both batteries but it is still slow to start. All the glow plugs checked out when I did the injectors. This truck has had a tough life by the look of it.
What does white smoke mean, and what are the common symptoms of hard starting?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Welcome to FTE bdonaldson. 
Did it smoke before you did the injector job?
If not then something went wrong with that job, whether it be a bruised o-ring from being too pinched to something didn't go right when they rebuilt the injectors, to possibly one of the copper o-rings on the bottom of the injectors didn't get properly crushed and it's leaking. I would remove the valve covers again and make sure that everything is properly torqued down as a start. You may have to pull all the injectors out again to review what went wrong.
Did it smoke before you did the injector job?
If not then something went wrong with that job, whether it be a bruised o-ring from being too pinched to something didn't go right when they rebuilt the injectors, to possibly one of the copper o-rings on the bottom of the injectors didn't get properly crushed and it's leaking. I would remove the valve covers again and make sure that everything is properly torqued down as a start. You may have to pull all the injectors out again to review what went wrong.
Senior User
Joined: Oct 2004
Posts: 420
Likes: 0
From: Bonney Lake, WA
Originally Posted by bdonaldson
I now am noticing that when I start the truck up it puffs white(ish) smoke until it is warm. The truck also takes allot of cranking to get started. I replaced the starter and both batteries but it is still slow to start. All the glow plugs checked out when I did the injectors. This truck has had a tough life by the look of it.
What does white smoke mean, and what are the common symptoms of hard starting?
What does white smoke mean, and what are the common symptoms of hard starting?
Senior User
Joined: Oct 2004
Posts: 420
Likes: 0
From: Bonney Lake, WA
Originally Posted by Kwikkordead
Did you verify that all eight glow plugs were good? All it takes is one burned out plug in a set of eight to make a pretty good sized cloud.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
The first and easiest thing to check is the glow plug relay. Pick one up at NAPA for $24. White smoke + hard start = glow plug system. The white smoke is unburnt fuel at idle.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Originally Posted by wolfe1104
will the cloud continue for a few minutes or is it just on the initial start up?
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