Knock with stock tune at WOT.

[AJP turbo]

At time stamp 4269 is the indicator to me that your bank 2 primary o2 sensor is giving out....And your WOT pulls are not near long enough to get good data

Not saying the 02 sensor is your only problem but I would start there before you drive your self nuts...Get the car mechanically sound then other things can clear up...

The difference between bank 1 and bank 2 is really off in places and your LAMBSE should match your afr...Atually the afr should match lambse, not to be mistaken with LAMBDA

[curry67]

Would a k&n air filter screw up o2 sensors?

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[AJP turbo]

That's actually a dumb question but no it would not...Sorry you left me no choice

[curry67]

lol i just hear people saying they screw up sensors. Im desperate to solve this as i want to drive around tuned before it gets to cold to have fun.

[AJP turbo]

Sometimes they aren't the greatest when they are over oiled for cars that use a MAF sensor for primary fueling  and airflow calculations because the filter is so close to the sensor it can become oil coated. But we use MAP sensors for fueling and airflow calculations and they are less prone to mis-calculations due to coatings of oil on them.

Just get your damn sensor changed and then see where you are before you speculate to death and reach for solutions that aren't relevant....You seem to be fighting changing the part but your data shows it needing changed, so do it already jeesh

[FoMoCoSHO]

Atually the afr should match lambse, not to be mistaken with LAMBDA

Could you explain the difference?

[FoMoCoSHO]

Atually the afr should match lambse, not to be mistaken with LAMBDA

Could you explain the difference?

So basically it's commanded Lambda?

[curry67]

Is it just one sensor or two?

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[SHOdded]

There is 1 upstream and 1 downstream sensor on each bank, curry.

From:  http://www.myo-p.com/Ford-EEC/EEC%20Help%20files/Files/Lambse%20notes.html
Lambse

Lambse is the A/F ratio that the EEC is commanding or you could call it targeted or short term fuel trim. In a perfect world the Lambse is the A/F ratio that you should see on a wideband.

The value of lambse is calculated from the various fuel tables.

In closed loop operation Lambse is the calculated A/F ratio needed to maintain the set point (14.64:1) as reported by the O2's, and it seems to adjust much faster then KAMREF correction value. In open loop LAMBSE is the a/f ratio that the computer believes is being injected.

Lambda is A/F ratio expressed as a percentage of 14.7:1. Just divide the A/F ratio by 14.7 to get lambda, or multiply lambda by 14.7 to get an A/F ratio. If the lambda is .88, the A/F ratio is 0.88 * 14.7 = 12.936

It's just a percentage of stoich, or 14.7:1 A/F ratio. To convert a lambda value to an A/F ratio just multiply by 14.64. exmp: 1.25 lambda * 14.64 = 18.3 A/F ratio

http://www.efidynotuning.com/ford/fuel101.htm

[AJP turbo]

Well said shodded...yes basically the way I interpret lambse is afr should match that...after all compensations the afr should match the lambse....

And shodded 14.069 is what you use for the multiplier instead of 14.7 or 14.64.....those would be for straight gas...the 14.069 must be what ford considers stoic for pump ethanol fuels...that's in the stock tune file

[SHOdded]

I just quoted the content of the first link   Yes, stoich needs to be adjusted for the fuel in question.

[ZSHO]

I thought it was 14.08 for 0.10 (standard gasoline)could be wrong.  Z

[AJP turbo]

I thought it was 14.08 for 0.10 (standard gasoline)could be wrong.  Z

Well that's pretty close...I'm sure if u do a search u would find some small variation...I've seen 14.06-14.3 for e10 gas and e85 is in the high 9's

[SHOdded]

A little data on gasoline/e-fuel stoich:
http://ethanolpro.tripod.com/id213.html
http://www.brighthubengineering.com/machine-design/15235-the-stoichiometric-air-fuel-ratio/

[curry67]

Well I figured out I have a highschool friend who's been a ford tech at a dealer in my town for 8 years so I finally found someone that will care.

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