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Old 01-05-2010, 06:00 PM
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Injector question

I was told that if there is discoloration inside the fuel bowl my injector o rings are bad. I changed the filter today and there was a black film on the wall of the blow and fuel inside was blue. Does this make any sense. The truck does run like it has a miss but sometimes to goes away if running for long periods of time.
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Old 01-05-2010, 06:29 PM
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Never heard that before... any wierd colored exhaust that you've noticed?
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Old 01-05-2010, 06:43 PM
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winter diesel is died light greenish blue, does your dipstick appear to be loosing oil?
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Old 01-05-2010, 06:50 PM
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Are you also adding 2 stroke oil after you fuel up? What lubrication or injector cleaner are you using?
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Old 01-05-2010, 07:30 PM
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just got the truck last week. Its been sitting for a could months its got 211,000 miles. Its got blue smoke at start up and runs a little ruff the smoke clears up after a little bit of running but the ruffness doesnt. I live in florida, does all diesel have winter blend figured it wouldnt down here cause its so warm. I just added stp diesel cleaner to the tank and just got done cleaning out the trash in the tank today.
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Old 01-06-2010, 02:46 AM
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The discoloration could be from deteriorated o-rings letting some oil pass them into the fuel system. You should clean yoru FPR screen, too, as you'll see lots of gunk stuck in there.
The injector o-rings don't last forever. Usually around 200k if they make it that far.
If you just got the truck, I'd replace them as soon as you get a chance, they aren't that expensive, only takes a couple hours and you'll know they are good and you won't have to do them for a long time.
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Old 01-06-2010, 12:46 PM
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Clean the FPR screen and did the bb mod and runs the best it ever has. But when is idles there a constent haze coming out of the exhaust. Also when you rev it the truck goes right to 2200 no problem then spudders a little around 2500 and then clears up and revs to 3000 no problem. Why does it do this?
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Old 01-06-2010, 01:10 PM
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Quote:
Originally Posted by DZL JIM View Post
The discoloration could be from deteriorated o-rings letting some oil pass them into the fuel system. You should clean yoru FPR screen, too, as you'll see lots of gunk stuck in there.
The injector o-rings don't last forever. Usually around 200k if they make it that far.
If you just got the truck, I'd replace them as soon as you get a chance, they aren't that expensive, only takes a couple hours and you'll know they are good and you won't have to do them for a long time.
In the FPR I did see alot of black fuild like oil in it. Also if I do just orings and later get my injectors rebuild can you still use the orings just put in or are they a one time use? How do I know if my injectors need rebuilt?
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Old 01-07-2010, 02:51 AM
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O-rings are not necessarily a one time use item, but you must be careful with them and if they look questionable they shoudl be replaced. For the money sometimes it's not worth the risk.
But I have pulled my injectors and installed them a couple times with the same o-rings and never had a problem. If they are in good shape and don't have many miles/hours on them you can probably save some $$$. Your call.
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