White smoke/ruff running.
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White smoke/ruff running.
I have a 1997 F-250 PSD, I have replaced the glow plugs, relay, and the temp sensor and it still smokes on cool morning start-up and runs ruff untill warm. wait light goes of right away and I tested the relay and it also goes off right away. Please help, I am getting frustrated. ps. read somthing about a glow plug control module any ideas?
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could it be the quaility of fuel you are using? how many miles on the truck. White smoke on a diesel means you are pushing to much fuel or it's unburned fuel. how are your glow plugs working IE are you geting power to them? should be simp,le enough to check wilt a multi meter on volts.
Lance
Lance
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This may not help because I don't know exactly what sensor works the glow plug sensor, but in all the desel systems I have worked with with a glow plug system there is a temp sensor that keeps the glow plugs working untill the engine warms up. It is also linked to a main brain that works.
When the temp sensor sends the temp to the main brain and the engine temp is cold, the brain sends signal to the relay to start working the glow plugs. and it keeps working the glow plugs until the engine warms up. I know the gm desel system in dept but not to much of the ford but they all work under the same priciple. My two cents
Lance hope it helps
When the temp sensor sends the temp to the main brain and the engine temp is cold, the brain sends signal to the relay to start working the glow plugs. and it keeps working the glow plugs until the engine warms up. I know the gm desel system in dept but not to much of the ford but they all work under the same priciple. My two cents
Lance hope it helps
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Originally Posted by iderby93
I have a 1997 F-250 PSD, I have replaced the glow plugs, relay, and the temp sensor and it still smokes on cool morning start-up and runs ruff untill warm. wait light goes of right away and I tested the relay and it also goes off right away. Please help, I am getting frustrated. ps. read somthing about a glow plug control module any ideas?
White smoke usually indicates coolant. Blue indicates oil. And Black indicates fuel.
I'd take the truck to a diesel shop and have them run a compression check. Keep in mind that a compression check on a diesel isn't the same as a gasser. It needs to be done by someone that majors in diesels. Hope this helps.
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Sounds like your glow plug system isn't communicating well. Try jumping across the two brass posts on your relay before firing it up and hold it for 10 seconds or so. (It gets very hot so be warned). Then fire it up and see if you have an improvement. If so, your relay may still be bad or it could be the wrong one.
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Touchofgrey, in a diesel white smoke means to much fuel or unburned fuel. I see it every day during the winter with my fleet of hummers when the glow plugs are not working. You have to pull the injectors to do a compression test on a deisel, or use the special cpu that will tell you automatically, like doing a compression unballance test whitch takes about ten min as opposed to pulling alll injectores then testing and puting them back. 4 to 5 hours. by testing with a multimeter at the glow plug it will tell you wheather there is power there or not to activate the glowplug.
as well as oftern we get deffective glow plugs from the manufacture.
Lance
as well as oftern we get deffective glow plugs from the manufacture.
Lance
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Originally Posted by lancekilgore
Touchofgrey, in a diesel white smoke means to much fuel or unburned fuel. I see it every day during the winter with my fleet of hummers when the glow plugs are not working. You have to pull the injectors to do a compression test on a deisel, or use the special cpu that will tell you automatically, like doing a compression unballance test whitch takes about ten min as opposed to pulling alll injectores then testing and puting them back. 4 to 5 hours. by testing with a multimeter at the glow plug it will tell you wheather there is power there or not to activate the glowplug.
as well as oftern we get deffective glow plugs from the manufacture.
Lance
as well as oftern we get deffective glow plugs from the manufacture.
Lance
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Originally Posted by iderby93
I have a 1997 F-250 PSD, I have replaced the glow plugs, relay, and the temp sensor and it still smokes on cool morning start-up and runs ruff untill warm. wait light goes of right away and I tested the relay and it also goes off right away. Please help, I am getting frustrated. ps. read somthing about a glow plug control module any ideas?
I forgot to ask........are you losing any coolant? That would lay my theory to rest if your not.
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Ok I'll agree with the white smoke could be coolant. I guess you could classify it as white smoke at start up is normally fuel and once warmed up would be coolant. beleive it or not there is still a cpu that operates the relay. could be as much as just a circiut board plugged in under the dash. or as big the main brain that operates the vehicle.
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Originally Posted by lancekilgore
Ok I'll agree with the white smoke could be coolant. I guess you could classify it as white smoke at start up is normally fuel and once warmed up would be coolant. beleive it or not there is still a cpu that operates the relay. could be as much as just a circiut board plugged in under the dash. or as big the main brain that operates the vehicle.
Oh yes.......technology marches backwards once again. What ever happened to the "KISS" way of doing things? LOL