truck driving me nuts plz help - Ford Powerstroke Diesel Forum
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Old 12-27-2011, 07:20 PM
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truck driving me nuts plz help

i have a 2002 7.3 f350.been in mid 30s and 40s lately truck starts quickly but has been throwing large amounts of white smoke after sitting all nite or sitting while at work for 8-10 hours,smoke lasts for roughly 5-10 min then clears up and is fine rest of the day...a little background to help rule some things out...8 remanned stock injectors from full force diesel,new glow plugs, 3 month old GPR which i know is kicking in(have a warning light hooked up to it) new UVCH.truck is not chipped and is stock except for k&n intake with AEM filter..what could be causeing truck to smoke like a freight train then clear up and be fine until motor looses its heat and is bone cold again??
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Old 12-27-2011, 07:29 PM
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Injector Orings? Not sure.
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Old 12-27-2011, 07:55 PM
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Are you sure you got stock injectors?
What does the smoke smell like?
If it smells like raw fuel the injectors will be dumping too much fuel.
If the smoke smells sweet you have coolant leaking.
Do you have to add coolant at any time?
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Old 12-28-2011, 12:50 PM
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id hafta rule out injector o-rings or atleast would hope so since they were installed less than 500 miles ago....i thought perhaps antifreeze but doesnt have the sweet smell usually associated with that and coolant level doest change,the exhaust stings your eyes and smells of raw fuel but cant figure out what would cause it,i suspect i may have a screwy EOT sensor cause according to warning lite(installed by me not factory dash light) GP's sometimes dont come on 1st time but if cycle key again they will,could the EOT cause this problem?
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Old 12-28-2011, 02:34 PM
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Well if it's fuel, that means it's not fully burning in the cold cylinders so it sounds like you're on the right track with one of the sensors that the PCM reads to decide whether or not to activate the GPR.
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Old 12-28-2011, 04:58 PM
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What sensor do yins suggest i look at,EOT,IPR,etc...?the part that gets me messed up is the GPR is getting power and is definately activating (hence the warning light so i can check on that aspect of it),GP's are heating up (guessing here)was 20 this mornin and after dash lite went out she cranked over 3 revolutions and was runnin could be wrong but if they were not heating it wouldnt start that easily...truck runs like a top other than the usual psd romps in the mornin and the smoke for bout 5-10 min...its not a power issue just have OCD and cant stand to have even the smallest thing wrong with my pride and joy
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Old 12-28-2011, 04:59 PM
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I'm not sure what sensors the PCM uses for GP operation.
I thought you said they weren't coming on sometimes?
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Old 12-28-2011, 06:13 PM
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guess i probly should have worded my earlier posts differently...i installed a idiot light to monitor wether GPR was getting power and energizing and 99% of the time the GPR energizes when it should but once in a while ill flip key and get no power to relay when it should be activating,but if i turn key off and turn it forward again the relay will get power and activate,this is what made me suspect the EOT sensor cause of the erratic power to relay issue...according to my understanding the sensor is just there as a reading for the pcm to decide how long GP's should run but could it be reading wrong and make computer think the motor is hotter than it really is and result in PCM or IDM dumping massive amounts of fuel that the cold motor cant burn?....thanks for your patience with me on this subject,and for the record i know my way around diesels but this 1 is throwing me for a loop
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Old 12-28-2011, 06:30 PM
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typical for a cold diesel engine, it's the unburned diesel from the cold motor. Mine smokes a bit for maybe a minute tops when I first fire it up on a cold morning. I usually don't plug my truck in over night either (electric bills gets up there if it's plugged in all the time all night. usually plug it in first thing in the morning when I'm letting my pooch outside so it's only plugged in for an hour tops before I'm leaving for work) to my understanding it's pretty normal for that to happen on a cold diesel engine.
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Old 12-28-2011, 06:32 PM
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Mine never smokes.
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