changed map and still problem - Ford Powerstroke Diesel Forum
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Old 10-23-2009, 05:13 PM
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changed map and still problem

had the advice to chang the map sensor because of chugging and surging. had already cleaned the egr, turbo and reset the kam. just got the sensor put in today and still doing the same damn thing. any advice? Thanks Dan
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Old 10-24-2009, 06:10 AM
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how are your fuel filters looking? I'm sure if you went through all the trouble of cleaning egr and the turbo that you probably already looked at these. So is your truck throwing any codes? Changing oil on a regular basis (preferably sooner than what the manual claims)
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Old 10-24-2009, 04:41 PM
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yeah fuel filters have 3 or 4 thousand km and engine oil and filter are under a thousand. the vanes in the turbo were not in bad shape at all, but now are perfect. when it is up to temp and running while travelling at normal accelleration it will drop all turbo power, but no rpm change and hear chugging through the intake, and i look at the exhaust and it dumps black smoke. don't have a code reader, but no check engine light comes on. maybe the vgt solonoid? i think they are fairly expensive though and don't want to buy one unless it is for sure the problem. kind of at a loss? Thanks for any help!
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Old 10-24-2009, 06:30 PM
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If it's blowing smoke and surging then it should have codes. It is pointless to try and diagnose the 6.0 without a good code reader.
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Old 10-24-2009, 09:03 PM
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ok i've got a friend with a code reader so i'll have him take a stab at it and then post up what ever we can find. Thanks
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Old 10-30-2009, 01:22 PM
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took truck to dealer this morning and had diagnostic check done. no codes came up and the service tech told me it is probably the aftermarket chip that is causing the problem. he said when they malfunction it can cause the truck to act up, so he removed the unit and also told me the pcm and ficm had not been updated with the current flash program so i had those done at the same time. truck seems to run good, but not as much power without the chip on. hopefully all done with this problem!
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Old 10-31-2009, 09:52 AM
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thought the problem was solved, but still doing the same thing. surging and chugging air back through the intake, so obviously it wasn't the programmer that was at fault, there is something else causing this, now i have no idea how to go about diagnosing it. i don't want to keep changing parts that aren't the problem. anyone have any ideas, im all ears. thank you
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Old 10-31-2009, 10:43 AM
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Does make a difference when you unplug the VGT solenoid?
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Old 10-31-2009, 02:57 PM
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yeah if i unplug the vgt solenoid it defaults to open, i think open anyway. i tried driving it like that for a couple of blocks just to see and it drives like it has no boost until way up in rpms, and has a way different sound, no whistlea and a deep tone, but didn't do any of that funky stuff like chugging and surging, and as soon as i plug it back in you hear the whistle come back. This problem is intermittent, but happens every time im driving.
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Old 11-01-2009, 06:11 AM
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did your unison ring in your turbo move freely when you were done cleaning the turbo?
Do you have an aftermarket air intake?
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