LMM: Dirty Idle?

CDR

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Apr 19, 2009
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So I pulled the DPF off of my 2008. I flashed the computer with my PPE tuner. Before I had a LMM I had a LB7 with no injector issues the idle was very clean. Seem at idle with my LMM there is almost a little haze and its very smelly... Balance rates at idle seem good in gear. Smoke doesn't seem exsessive while driving... what else do I need to check? has anyone else had an issue like this?
 

07.5 LMM

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Jan 6, 2012
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It seems like its semi normal for deleted LMMs. Some do some don't but I don't think anything is wrong

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CDR

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Apr 19, 2009
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oh good that what I was hoping to hear. It just a haze that you can only see in headlights of a car behind it not to bad but WAY dirty then my LB7
 

CDR

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Apr 19, 2009
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I wonder is I mess with the mm3 in EFI if I can clean it up a bit...
 

07.5 LMM

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Jan 6, 2012
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mine definetly stinks, but it doesn't haze. I don't know if anyone has looked into what causes it or fixes for it or not. I say give her a shot.
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
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I wonder is I mess with the mm3 in EFI if I can clean it up a bit...

Messing with the MM3 of fuel will not clear it up, but upping the rail pressure from 30 to 35 does a bit I have found. LB7's without a cat run 35 MPA of rail pressure at a hot idle whereas DMAX's with cats run 30MPA of rail pressure. I normally up them to 35 at idle now to try and help with the smell a bit. I know I dropped my LB7 down to 30 like the cat equipped trucks have, and it sure hazed at an idle as well as stunk.
 

CDR

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Apr 19, 2009
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Messing with the MM3 of fuel will not clear it up, but upping the rail pressure from 30 to 35 does a bit I have found. LB7's without a cat run 35 MPA of rail pressure at a hot idle whereas DMAX's with cats run 30MPA of rail pressure. I normally up them to 35 at idle now to try and help with the smell a bit. I know I dropped my LB7 down to 30 like the cat equipped trucks have, and it sure hazed at an idle as well as stunk.

Interesting I wonder why they lower the pressure with the cat.... I'm going to give it a shot
 

CDR

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Apr 19, 2009
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whats intersting my buddys LML doesn't smell bad or haze with a straight pipe
 

jwrkansas

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Mar 3, 2012
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The only time my lmm EVER hazed was when I had it straight piped and didn't have a tune on it yet. Was driving behind my wife one night while she was in it and I noticed a good amount of haze. I chalked it up to post injection. Its shut off now and I don't see any haze at all....idk maybe just coincidence
 

Harbin_22

Active member
Dec 4, 2010
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Messing with the MM3 of fuel will not clear it up, but upping the rail pressure from 30 to 35 does a bit I have found. LB7's without a cat run 35 MPA of rail pressure at a hot idle whereas DMAX's with cats run 30MPA of rail pressure. I normally up them to 35 at idle now to try and help with the smell a bit. I know I dropped my LB7 down to 30 like the cat equipped trucks have, and it sure hazed at an idle as well as stunk.

Just wondering how you are bumping RP on LMM's.
 

Harbin_22

Active member
Dec 4, 2010
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Southern Indiana
I've been lucky and they respond to the rail pressure tables. I know some have had issues, but I haven't had that one. On the other hand I have had problems with the dreaded oil change system tripping to soon on the LMM's.

Wow, you have gotten extremely lucky on them following the table. I have never had/heard of oil change reminder problems. What OS are the ones that follow the rp tables?
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
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Wow, you have gotten extremely lucky on them following the table. I have never had/heard of oil change reminder problems. What OS are the ones that follow the rp tables?

The ones I've done have been the 7083 on the 07.5 trucks. All the LMM's I've done have been 07.5's by some wierd chance. The oil change problem is a known issue, and theres no ryme or reason as to why some do it. I read about it on EFILIVES forum, and the last one I did bit me with it.
 

NC-smokinlmm

<<<Future tuna killer
May 29, 2011
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I've been lucky and they respond to the rail pressure tables. I know some have had issues, but I haven't had that one. On the other hand I have had problems with the dreaded oil change system tripping to soon on the LMM's.

Did you mean to say fuel filter life system? I had issues with mine tripping untill I jacked my lift pump pressure up to 28 psi. Since that I haven't had a single issue...

My LMM also stinks to high heaven, but it dosen't haze unless it is below 25 degrees and then it's very minimal...
 

jwrkansas

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Mar 3, 2012
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The oil change problem is when you're oil life drops rapidly. all the trucks i've tuned have been 594 o.s. and they've all shown oil life that is about half of what a normal oil change interval should be. Oil change distances in all tunes are stock. Seems that when you adjust fuel tables,(inject more fuel) it decreases oil life. No fix as of yet as far as I know.