Duramax Diesels Forum Truck of the Week
  #1  
Old 04-09-2018, 05:28 PM
2005redlly's Avatar
2005redlly 2005redlly is offline
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Default Questions about balance rates

I picked up a lb7 and it has a white haze and rough idle. I had my oil tested and it came back with high copper (67). No fuel in oil.

Truck is warm and in drive
Cylinder 1- -4
2-0
3- -1
4-0
5-4
6-1
7-1
8- -1

Warm in park
1- -5
2-1
3- -2
4- 1
5-4
6-1
7-2
8- -2

Wondering if the injectors are the issue?
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2005- BW FMW S467.7/83/.90 / 100% overs/ppe dual fuelers/ Efi live by DA/ DA trans/ SC1073/ arp headstuds/ bbp traction bars/ DHD lock box/ A.D165/ truetrac/ mishimoto intercooler /fleece tapshifter

stock turbo/fuel 1/4mile-13.3@103 1.9 60' @7290lbs
Stock cp3 12.01@113.50 1.66 60'
1/8mile 7.50@91 11.83 1.69 60' 113mph
1/8mile 7.41@93 11.67 1.68 60' 115mh

2004 sclb ls. Stock for now sold
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  #2  
Old 04-09-2018, 05:32 PM
2005redlly's Avatar
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Default

Also sounds like a lope tune sometimes to me.
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2005- BW FMW S467.7/83/.90 / 100% overs/ppe dual fuelers/ Efi live by DA/ DA trans/ SC1073/ arp headstuds/ bbp traction bars/ DHD lock box/ A.D165/ truetrac/ mishimoto intercooler /fleece tapshifter

stock turbo/fuel 1/4mile-13.3@103 1.9 60' @7290lbs
Stock cp3 12.01@113.50 1.66 60'
1/8mile 7.50@91 11.83 1.69 60' 113mph
1/8mile 7.41@93 11.67 1.68 60' 115mh

2004 sclb ls. Stock for now sold
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  #3  
Old 04-09-2018, 05:33 PM
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Default

You definitely have one injector reading out of spec and one right on the line. Canít speak as to the copper tho
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Old 04-09-2018, 05:38 PM
2005redlly's Avatar
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You think it's cylinder 1 and5?
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2005- BW FMW S467.7/83/.90 / 100% overs/ppe dual fuelers/ Efi live by DA/ DA trans/ SC1073/ arp headstuds/ bbp traction bars/ DHD lock box/ A.D165/ truetrac/ mishimoto intercooler /fleece tapshifter

stock turbo/fuel 1/4mile-13.3@103 1.9 60' @7290lbs
Stock cp3 12.01@113.50 1.66 60'
1/8mile 7.50@91 11.83 1.69 60' 113mph
1/8mile 7.41@93 11.67 1.68 60' 115mh

2004 sclb ls. Stock for now sold
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  #5  
Old 04-09-2018, 05:45 PM
Ne-max's Avatar
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Time for a set of injectors
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Old 04-09-2018, 06:05 PM
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Is the v2 capable of turning injectors off? I was told these injectors only have 45k on them. Would only replacing the bad ones be ok?
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2005- BW FMW S467.7/83/.90 / 100% overs/ppe dual fuelers/ Efi live by DA/ DA trans/ SC1073/ arp headstuds/ bbp traction bars/ DHD lock box/ A.D165/ truetrac/ mishimoto intercooler /fleece tapshifter

stock turbo/fuel 1/4mile-13.3@103 1.9 60' @7290lbs
Stock cp3 12.01@113.50 1.66 60'
1/8mile 7.50@91 11.83 1.69 60' 113mph
1/8mile 7.41@93 11.67 1.68 60' 115mh

2004 sclb ls. Stock for now sold
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  #7  
Old 04-09-2018, 06:11 PM
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duramax on fire duramax on fire is offline
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Default

I had a haze at idle balance rates where about the same as yours.

Theres no way I would do all that work for one. If you have a bank open do all 4 just me. but you need to figure out the rough idle first. make sure its not the pump or fpr causing the idle issue.

Plus when you pull the high pressure line it fills the top of the injector full of crap. Been several guys that ruined injectors 10k miles later after head gasket job
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Old 04-09-2018, 06:12 PM
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Could also be a bad fpr causing the lope.
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Old 04-09-2018, 06:25 PM
2005redlly's Avatar
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Another thing, I can let it idle for awhile and when I leave it leaves a big cloud of white smoke. So the injectors wouldn't cause the rough idle? And also a fuel leak somewhere in the valley area.

The reluctor wheel came loose, and I got the truck truck somewhat cheap. Would the reluctor wheel cause the rough idle if it wasn't exact?

Thanks for all the help
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2005- BW FMW S467.7/83/.90 / 100% overs/ppe dual fuelers/ Efi live by DA/ DA trans/ SC1073/ arp headstuds/ bbp traction bars/ DHD lock box/ A.D165/ truetrac/ mishimoto intercooler /fleece tapshifter

stock turbo/fuel 1/4mile-13.3@103 1.9 60' @7290lbs
Stock cp3 12.01@113.50 1.66 60'
1/8mile 7.50@91 11.83 1.69 60' 113mph
1/8mile 7.41@93 11.67 1.68 60' 115mh

2004 sclb ls. Stock for now sold
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  #10  
Old 05-07-2018, 11:11 AM
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Mine is doing the same thing. I have already diagnosed it as bad injectors. I have noticed that when the truck lopes, it'll smoke more. Sometimes it'll run smooth and very little smoke. My injectors only have roughly 80k miles, but been smoking for a long time.
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  #11  
Old 05-07-2018, 11:38 AM
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Should check the fuel pressure. See how stable it is and how close it matches the command pressure
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