using 14.047 for desired AFR and not 14.63?

[SOMhaveit]

I get it at this point. What has happened in my case is that during the auto VE process, I was unknowingly running E10 and made my VE table adjustments based on the E10, so my AFR is pretty good in my SDOL tune. I don't use the NB o2s or the STFT/LTFT.

I understand that the correct thing would be to put the correct value in B3601 and tune from there, and I guess I'll do it when I get a chance.

Thanks guys.

[Mr. P.]

...Did you mean to divide by 1.035 rather than to multiply by 1.035...?

Almost - I was thinking 'lean' but typed the word 'rich' instead :banghead: Sorry for the rookie move on my part.

Mr. P.

[joecar]

No worries... you should see some of my typos...

If you meant 'lean', then 1.035 is Lambda instead of EQ in my post above.

[whackem04]

i changed my afr to 14.22 and posted a log. Would love input on it.
89 oct in the tank

[CalEditor]

Compare these 2 .bin files.
I need to check on the current reading of the wide-band on the Non Flex/Fuel with the stoich set at 14.17. I think he said it is 14.5
05 5.3L Flex 12592618 .bin.zip

Steve's Tahoe 12592618.zip

[98 tigershark]

I still keep running into E85 in gas stations out here. 4 now have done that to me and who know who else. In the sticks we have to get fuel were we can. You really have to be careful as E85 is only 2/3 the price to stations so in hard times they seem to get the less expensive stuff and charge you for normal gasoline. Your car will run cruddy and could even cost some repair bill and possible damage with that fuel so watch out for your motor.
I am getting really cold weather here and the vette is parked for the winter, How about everyone else in Spokane, or in the rest of the world?
Cheers,:->
98 Tigershark

Compare these 2 .bin files.
I need to check on the current reading of the wide-band on the Non Flex/Fuel with the stoich set at 14.17. I think he said it is 14.5
05 5.3L Flex 12592618 .bin.zip

Steve's Tahoe 12592618.zip

[ScarabEpic22]

Speaking from experience, Spokane is frigid right now. It says 26F out, the feel with the humidity and slight breeze is around 20-21F. Supposed to be down around 8F next week for a night or 2.

[CalEditor]

I am in Rock Hill SC. Nice down here. I need to make a trip back up to the frozen tundra soon.
Been tuning a Mazda Pickup with a Turbo Northstar in the rear and it runs on an LS1 PCM.

[DrkPhx]

FWIW - I wouldn't change stoich on a LS1 PCM based on supposed E10 ethanol content because the mixture can vary from gas station to gas station and even brand to brand. Here in MN, all gas is ethanol based (with a few rare exceptions), so it's a fact of life. Some of the newer stations have pretty good in-ground ethanol sensing equipment that allows them to monitor the content of each tank, but some don't. Most of the dealers also have ethanol content testing equipment to check fuel content when vehicles come in for warranty work for related repair. You would be surprised how much variance there is even from one station.

I've done a few test tunes with different stoich and fuel combos and always come back to the factory stoich and E10 93 octane for my TA for the best overall results. My .02

[CalEditor]

FWIW - I wouldn't change stoich on a LS1 PCM based on supposed E10 ethanol content because the mixture can vary from gas station to gas station and even brand to brand. Here in MN, all gas is ethanol based (with a few rare exceptions), so it's a fact of life. Some of the newer stations have pretty good in-ground ethanol sensing equipment that allows them to monitor the content of each tank, but some don't. Most of the dealers also have ethanol content testing equipment to check fuel content when vehicles come in for warranty work for related repair. You would be surprised how much variance there is even from one station.

I've done a few test tunes with different stoich and fuel combos and always come back to the factory stoich and E10 93 octane for my TA for the best overall results. My .02

That is way off in my opinion!

look at the 2 bin file and tell me what a wide-band would read on the flex fuel truck with E10 fuel