Hey guys,

I'm trying to use tunerproRT and looking at my datalogs it says the integrator is 128, but the blm is 160. this means very rich.. right?

 

If your BLM is at 160 you are running SUPER LEAN.

 

lean? that's got to be a sensor problem ... I have flames shooting out of my exhaust manifold.. how can that be lean?

 

Your O2 sensor could be on the way out!!!

 

You are running it without pipes? How can you see flames coming out of the exhaust manifold? I did that with my 360...ONCE years ago when I first put the 360 in the Jeep. It set fire to the grass under the Jeep. I haven't done it again since. Regardless, you are probably gonna see some flames out of the manifold flange without a pipe on it.
Anyway, if you don't have a pipe on the thing, it seems to me that you may be getting some air drawn back into the manifold as the exhaust pulses kinda draw back into the flange.
If you do actually have a pipe on it, then I am a jackass and all of this is N/A.
EDIT: What ECM/mask are you running? I have an 8746 and my max BLM is 150.

 

ok. while I try to tune this thing, and stop the flames, is there a way to disable the o2 sensor and keep my blm at 128?

 

Won't do you any good. You can run it in open loop, but then in my understanding of it all, you aren't tuning the closed loop VE stuff. The BLM will sit at 128 in O/L I think.

 

Unpluging the O2 will disable it, then just unplug the battery for 30 sec to clear the ecm memory. See if this helps.

 

Wouldn't that give meaningless BLM data...if any data at all? It would go closed loop, but would the ECM have any idea where to set the BLM or INT?
I agree that if the exhaust is set up right it sounds like the O2 sensor may be on the way to the trash can.

 

The ecm would make no corrective action, but if it runs better with no O2 installed then shes a bad sensor, or wrong tuning.

 

With a stock BIN, I would lean to the bad sensor...but we know that the stock BINs aren't the greatest. So...where does that leave us? Since he is tuning it, maybe he really IS that lean, but I don't see how unless the chip burn got screwed up or the correction to the VE was just really wrong...BLM of 160? I've seen 131 and that is the highest I have yet seen that I recall. Does the ECM scale the BLM value to the overall scale provided (max and min BLM) in the BIN?

 

Yes the ecm will go to the max and min values, if thats waht it takes. Now the reason there is max and min values is so the ecm doesn't falsely over compensate due to a bad sensor.

 

I was kinda asking if the ECM would change the swing point from 128 based on the max and min values. That might be worth an experiment or two. You could use O2 voltages as a comparison point. Say your O2 swings at 0.450V and 128 BLM. Change the MAX and MIN BLMs and see if the new BLM swing point moves in relation the the O2 swing point of 0.450V.

 

U know, dumb idea here. Before u go chasing stuff, reverify the bin u loaded and that it is setup properly. Pull it and read it to verify.

I know a guy here who loaded a bin for his Formula up instead of one for his GTA(next to stock) it ran very lean for some odd reason :-)

later
Jeremy