White smoke
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Senior User
Joined: Apr 2002
Posts: 267
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From: Peoria, Il
White smoke
I have a friend with a 99 F250 with the 7.3 anytime temps are below 40 when he starts it it billows white smoke like crazy, if you try to accelerate it just pours out extra smoke with no gain in rpm.. this lasts for about 45 seconds. I told him i figured glow plugs, the light is working and he is waiting for it to go out. any ideas?
thanks
Bone
thanks
Bone
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Senior User
Joined: Apr 2002
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From: Peoria, Il
its not easy to plug it in when you are not home every night, and we never had one of ours smoke like this thing at 40 degrees F, it hasnt always been this way, it is just recently as fall is commin on.
Bone
Bone
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Senior User
Joined: Apr 2002
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From: Peoria, Il
by not home i mean the truck is physically in places where it is not practicle to be plugged in. thanks for the information, but im trying to figure out why it has recently started smoking like this at 40 degrees when it never smoked before down to 20, and has never been plugged in.
Bone
P.S. this is white diesel smoke not oil, truck has about 80,000 miles on it
Bone
P.S. this is white diesel smoke not oil, truck has about 80,000 miles on it
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
The light coming on and going off means nothing. You need to get under the hood and verify that the glow plug relay is actually passing current. From what I have read here on the board, the relay fails a lot.
All this smoke is simply a cold diesel engine struggling to run. Get the glow plug system working again and it will start smoke free.
All this smoke is simply a cold diesel engine struggling to run. Get the glow plug system working again and it will start smoke free.
Postmaster
Joined: Sep 2004
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From: Bellingham, WA
My glow plug relay failed last season and had problems similar to yours. Replaced the relay and I have never seen any more than 1 small puff of white and that has been all the way down to 5 degrees without being plugged in. Something is definately wrong with the glow plugs or relays.
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Senior User
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From: Peoria, Il
Where is this relay located, he doesnt have the book, and i dont have a 7.3 like this one to be farmiliar
thanks,
bone
thanks,
bone
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The GPR is on the top left of the engine towards the front. You have to take the plastic shield off of the motor. If your friend has a Chilton's or Haynes' manual there are pictures and testing procedures. Not hard at all and a common failure. Most auto parts places carry replacements.
Elder User
Joined: Jun 2005
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From: Connecticut
Originally Posted by efoster_01
Where is this relay located, he doesnt have the book, and i dont have a 7.3 like this one to be farmiliar
thanks,
bone
thanks,
bone
Look next to to fuel filter,there are 2 relays.Ones for the glow plug and the other is an air heater.