mn_sclb
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I have access to parts for testing too. Two l99 7.3s, two obs 7.3s, and a international boom truck with a t444
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My 7.3 issues
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mn_sclb
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psduser1
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300/600? Is that an actual thing?
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I'm sure someone can build that :tree:
bluedge8
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where did you say you lived? IGH, or cottage grove?
300/600? Is that an actual thing?
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Why not? 300cc injector, common. 600% nozzle, yep.
ja_cain
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Did you say ebp was a constant 600+? That should be way off scale for the sensor. I guess maybe you were talking about egt, but maybe not if it is constant. Black smoke like that screams boost/air restriction issues to me.
mn_sclb
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IGH/SSP area
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mn_sclb
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I don't think the pcm monitors egt.. The only other thing I can think of is that it was showing a different unit other than psi but that's what everything else is in.
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mn_sclb
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Last edited:
mn_sclb
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Just gonna go out on a limb here... But I think this
may have something to do with the no boost reading. I had no idea what that was for, I assumed the waste hate solenoid was the map sensor. It looks like the line was broken out of the sensor
yet another one to add to the list 
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ghohouston
Active member
Yeah, that map sensor line breaking like that will cut your power WAY down.
mn_sclb
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I figure that's the cause of the waaaay excessive smoke. But could that cause any of the other stuff like intermittent erratic idle or idle smoke
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Yes...
mn_sclb
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Seems like a dumb question I just didn't know if turbo boost reading would affect idle fueling (where there isn't any boost) but thanks. Hopefully this is it.
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mn_sclb
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I'm sure all of the general question can get annoying. I'm just glad to have the help so I don't have to take shots in the dark. It's just kinda frustrating to think its this and that just to find something that's RIGHT IN FRONT OF YOU, that you overlooked
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ja_cain
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It doesn't I just assumed it was a typo and maybe you had a gauge or something because the number didn't make sense to me and was inline with what the egt's might read. Though they shouldn't stay constant like that unless something is broken.
ja_cain
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The good thing is that you are under the hood and familiarizing yourself with everything. Like Ty said, we have all been there and had to start somewhere. Sites like this one have made knowledge/experience much more accessible.
I agree that map unhooked/broken shouldn't effect idle smoke output. What color is the smoke. Does it smell like unburnt fuel?
mn_sclb
New member
White afaict, as the rpms come up its definitely blue, then it just stops. It smells like more oily burnt smelling, it's not sweet smelling like fuel. Kinda smells like a bobcat or a semi just kinda dirty idk
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