[Eric95TT]

I just installed this and noticed some pecularities. At idle it seems to fluctuate between 14.6-15.2, which I figure is normal and ok. Driving around it tends to stay in this region but it really seems to fluctuate around a lot more than I thought it would

Whenever I let off the gas, it goes super lean, i mean beyond 17 and the display shows the three out-of-range bars. Whether I am in gear or not, it does this. Is this normal?!?

I had it dynoed last week and the AFR looked very good, 14.5-15.5 and then around 12.5-13 at WOT (362rwhp on 93 gas, probably around 13-15psi as I cannot see the stupid hks evc screen to properly adjust it)

The sensor is mounted about midway down the dp, about 8-12 inches from turbos

thanks for any insight

 

[98mkiv]

when you decelerate, then engine isn't getting fuel..... lean is normal.

-M

 

[WayneCar]

I just installed this and noticed some pecularities. At idle it seems to fluctuate between 14.6-15.2, which I figure is normal and ok. Driving around it tends to stay in this region but it really seems to fluctuate around a lot more than I thought it would

Whenever I let off the gas, it goes super lean, i mean beyond 17 and the display shows the three out-of-range bars. Whether I am in gear or not, it does this. Is this normal?!?

I had it dynoed last week and the AFR looked very good, 14.5-15.5 and then around 12.5-13 at WOT (362rwhp on 93 gas, probably around 13-15psi as I cannot see the stupid hks evc screen to properly adjust it)

The sensor is mounted about midway down the dp, about 8-12 inches from turbos

thanks for any insight

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Sounds normal to me. At light throttle the ecu keeps making
minor adjustments. When you let off the gas it goes into
deceleration mode. This increases your mileage and is quite safe.
Wayne

 

[allshoandgo]

sounds normal.

 

[Smaay]

yeah the injectors are basically turned off, so lean it is...no worries

 

[supra400hptt]

All normal except wot. 13 is a little high imo. I tune for 11.5.

 

[Eric95TT]

Thanks, guys.

When I get the mapecu in there, i will tune it a little lower at WOT, around 12 or so.