Surging at start-up
Elder User
Joined: May 2006
Posts: 586
Likes: 1
From: Billings Mo
Originally Posted by BowTieHatr
it will run but i would not want to unplug it just on a hunch because they are not fun to get to. pull the egr valve out and check it and see what it looks like. it should be sooty, not carboned clogged. if it is carboned, replace it. i have cleaned 2 egr valves and both started sticking with me and when they do this you could push the truck faster than it goes.
Just to hazard a guess about these, for lack of a better word, "hanging" turbos. From what everybody has said they seem to surge untill they've warmed up. Could it be, possibly, that either the bearing pack in the turbos themselves have glazed cooked oil on them? That would explain the surging they have while cold (because the gummy crud hasn't cooked off of them) and running normally after warmup (because the bearings are hot enough that the glazing melts somewhat) allowing the turbos to spin freely?
Is this possible?
Gunner15a
Postmaster
Joined: Sep 2005
Posts: 2,725
Likes: 3
From: Florence,SC
Originally Posted by Gunner15a
BowTieHatr
Just to hazard a guess about these, for lack of a better word, "hanging" turbos. From what everybody has said they seem to surge untill they've warmed up. Could it be, possibly, that either the bearing pack in the turbos themselves have glazed cooked oil on them? That would explain the surging they have while cold (because the gummy crud hasn't cooked off of them) and running normally after warmup (because the bearings are hot enough that the glazing melts somewhat) allowing the turbos to spin freely?
Is this possible?
Gunner15a
Just to hazard a guess about these, for lack of a better word, "hanging" turbos. From what everybody has said they seem to surge untill they've warmed up. Could it be, possibly, that either the bearing pack in the turbos themselves have glazed cooked oil on them? That would explain the surging they have while cold (because the gummy crud hasn't cooked off of them) and running normally after warmup (because the bearings are hot enough that the glazing melts somewhat) allowing the turbos to spin freely?
Is this possible?
Gunner15a
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Junior User
Joined: Aug 2006
Posts: 70
Likes: 0
Its just weird that the truck only surges with it is ideling and not moving. As soon as it start to move it quits which make it really weird. The idel drops down to about 400 or below and it just sound like my Camaro with the 110 lsa cam. It just shake and lopes like a SOB. I did get a call from a friend of mine who is a diesel mechanic and he told me to unplug the EGR valve while it is surging to see if it will stop. Can I do this and will it hurt anything.
Thanks,
Blake
Thanks,
Blake
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Junior User
Joined: Aug 2006
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Thats what my dad thought it might be but not sure. I wish I had someway to check them before I carry it somewhere to see what is causing the problem. I tried the EGR today and it didn't seem to work. Actually it made the idle drop just a little bit lower. But if it comes down to it then I'll carry it to my local diesel shop.
Thanks,
Blake
Thanks,
Blake
Thread Starter
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Junior User
Joined: Aug 2006
Posts: 70
Likes: 0
Because all the techs at the dealers around here are *******s. They won't help you unless you bought the truck from them.
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Joined: Aug 2006
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I have a good place to go but they are swamped with work right now. They have worked on all three of my 7.3 strokes. I need my truck so thats why I am asking people on here if they have had the same issue and how it was fixed.
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