Can going lean = smoke??

TYTILIDIE

TYTILIDIE

METH HEAD
I have this little problem, it has been going on now for almost a year and I am not sure quite what to make of it. Infact, I have even posted about it once or twice and never got any feedback. Sometimes, and oddly enough it is only from a roll and when the trans downshifts hard, the truck will take off insanely fast and then you feel this stutter I guess you could call it and out comes this HUGE cloud of smoke. I have tried capturing this on DM and went over the log and found nothing odd. One thing I noticed today as I was trying to get it to do this to note AFRs, blah blah, is that when the trans downshifts hard, i.e. into second, boost shoots way up. Usually around 20+. AFR goes into the low 12's. Sometimes high 11's. Now at my higher boost levels, my truck seems to like 11.9ish, but not from a roll? So I am wondering, could the smoke I am seeing be from leaning out for a second? And if so, what is actually causing this smoke? It is very black, like a diesel almost. Appreciate any input on this.
 
supersports10

supersports10

New member
Re: Can going lean = smoke??

from a roll it is "loading up" with fuel momentarely, untill it makes the downshift into 2nd.
 
TYTILIDIE

TYTILIDIE

METH HEAD
Re: Can going lean = smoke??

supersports10 said:
from a roll it is "loading up" with fuel momentarely, untill it makes the downshift into 2nd.
Click to expand...

I thought of that too, only problem is AFRs dont say so you know? I am wondering how I can cure this. The real odd thing is that it doesnt always do it. It does it about every 5 times I floor it. So I floor it does it then go about 5 times and its fine. MAybe I will have to log it with Tuner Pro and look at all the little data as well.
 
It's just a six

It's just a six

Super Member
Re: Can going lean = smoke??

Could be from detonation.
Carbon blowing off the pistons?
You still do not have alky ,correct?
 
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