bad smoke
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bad smoke
My 7.3 in my 96 f-250 smokes white on startup for about 10 min. then it runs completly clean. I took it to a ford garage they replaced 1 injector and the glow plugs, now my truck still smokes white on startup but now it also smokes black. The black smoke comes and goes, but it still smokes white for 10 min. If anyone has any advice it would be appreciated.
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
hey Matt5598, welcome to FTE.
my guess would be that the actual relay (Glow Plug Relay) that controls the plugs is bad, and it's not sending juice to the new plugs. replace that and it should cure your problems. it did on our 1995 PSD.
also moderators this should be in the OBS 7.3 forum
See ya around
my guess would be that the actual relay (Glow Plug Relay) that controls the plugs is bad, and it's not sending juice to the new plugs. replace that and it should cure your problems. it did on our 1995 PSD.
also moderators this should be in the OBS 7.3 forum
See ya around
Logistics Pro
Joined: Mar 2004
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Welcome to FTE!
Did it run roughly during those first 10 minutes before they did the glow plugs, and now still smokes but does NOT run roughly?
I wonder if it could've been the glow plugs before, and then when they replaced an injector, gave you an injector o-ring problem. Just one thought...
Not sure where you're located so not sure if temps would still be an issue for glow plugs/gpr.
Did it run roughly during those first 10 minutes before they did the glow plugs, and now still smokes but does NOT run roughly?
I wonder if it could've been the glow plugs before, and then when they replaced an injector, gave you an injector o-ring problem. Just one thought...
Not sure where you're located so not sure if temps would still be an issue for glow plugs/gpr.
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Hello- Welcome to FTE! I have moved your post to the specialized forum we have here for your question. Check out the list of tech forums we have on FTE. There is a wealth of information and expertise here to help you. There are a number of links in my sig below to help you also. Have fun! 
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I just changed the glow plug relay and the fuel filter, still has alot of smoke. When I took it to the dealership I was missing on 1 cylinder and white smoke for 5 min. then the truck ran totally clean. After the dealership the miss went away for 2 days but the white smoke got severely worse, and then I had black smoke once in a while,and also dumping black on acceleration.(it never did that before) I bought this truck 1 year ago and unti about 1 month ago it was the cleanest deisel I had ever seen. I bought a set of used injectors and I have sent them out to be rebuilt. Do you think injectors might solve the problem? I have stuck $1,400 into this problem already and it keeps getting worse.
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Just updating whats been done to my truck, I took it to a deisel shop, and they found that the fuel pump was only putting out 10 psi. They replaced the pump but I still have white smoke and a miss on #3 cylinder. They checked all my wiring and connections and found no problems. Tomorrow they are going to pull all the injectors and put new seals in. Do you think this could be the problem? The shop was very suprised that I made it the hour drive to thier shop with no issues,due to low fuel pressure.
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Joined: May 2001
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From: Cabot, Arkansas
The white smoke definitely sounds like it could be leaky injector o-rings....but the sudden onset of black smoke???? Maybe a restriction in the intake.
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My trucks problem was that the previous owner had replaced the #3 injector and broke the bottom out of the injector sleeve, then he just stuffed an injector into the hole and said good enough. I don't know why it took a year for it to start smoking. But that was the answer to my smoking problem.
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