Can't add fuel with MPG Booster Tune U7135

abuelo · Post by **abuelo** » Mon Aug 29, 2011 7:30 pm

I just installed my wideband & I've been trying to add fuel but is doesn't seem to work. The tool takes the change and flashes the car, but it doesn't seem to make any difference (my afr before & after is roughly 12.8-13) even adding 20% more fuel all along the range. Am I missing something?
Thanks,

shocknawful · Post by **shocknawful** » Mon Aug 29, 2011 9:02 pm

I'm pretty sure the fuel trim adjustments are only for WOT conditions in the "modify tune" section.
Are those AFR reading taken @ WOT?

abuelo · Post by **abuelo** » Mon Aug 29, 2011 9:28 pm

Yes, everthing is at WOT..

Post by **mikel** » Tue Aug 30, 2011 10:11 am

thats kinda lean, sure you are not removing fuel?

add 20% then post up last tune written.

abuelo · Post by **abuelo** » Tue Aug 30, 2011 6:46 pm

The AFR is basically the same before & after I added the fuel....here is the tune with the added fuel.

abuelo · Post by **abuelo** » Thu Sep 01, 2011 7:14 pm

Bump!!

Post by **mikel** » Fri Sep 02, 2011 9:54 am

what revision are you running?

abuelo · Post by **abuelo** » Fri Sep 02, 2011 7:13 pm

abuelo · Post by **abuelo** » Sun Sep 04, 2011 8:48 pm

Today I tried that tune (with maxed fuel) and loaded it as a custom tune, reseted the parameters and maxed the fuel again. It did seem to have some effect, but not as it does with the 91octane tune.
One additional info is that I live at 8000 ft above sea level, so the max MAP I'll get is 76KPa (even with switch on - engine off) can it be some influence?

abuelo · Post by **abuelo** » Sun Sep 04, 2011 9:05 pm

Attached is a file (in csv format 'cause I can't log afr with the predator so I'm using another software. This was after putting two time +20% fuel. It is slightly lean at high rpm. I tried a 3rd time the whole process but didn't help.

abuelo · Post by **abuelo** » Tue Sep 06, 2011 11:31 pm

bump!

Post by **mikel** » Wed Sep 07, 2011 9:52 am

this is based on a wideband, correct?

abuelo · Post by **abuelo** » Wed Sep 07, 2011 9:26 pm

Yes, a PLXdevices wideband connected to PCMscan software. Vehicle OBD data is captured also by PCMscan by ELM327 interfase.

abuelo · Post by **abuelo** » Wed Sep 07, 2011 9:59 pm

By the way; I'm pretty shure the wideband is measuring correctly because at partial throttle the AFR is mantained near 14.7 (14.5-14.9); with the 91 octane tune is 12-12.5 a tad rich but it is adjustable with the predator.

abuelo · Post by **abuelo** » Mon Sep 12, 2011 6:24 am

Dont forget about me....

Can't add fuel with MPG Booster Tune U7135

Can't add fuel with MPG Booster Tune U7135

AFR-fuel adjustments

RE: AFR-fuel adjustments

RE: AFR-fuel adjustments