Thread: AFR Error will not work.

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  1. #1 AFR Error will not work. 
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    I recently wired my wideband into my egr wiring harness and I have the normal AFR working but for some reason i can not make the AFR error give me any data at all.

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  3. #2 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    did you set up the error maths?

    this is ls based, but you cant see what hes doing and make it work, how i got mine working. HP Tuners 3 0 VVE Scanner and Error setup - YouTube

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  4. #3 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    dint see both pics before.

    looked at my set up, in column im using manifold absolute pressure in KPA

    and rows is et to rpm's. engine speed sensor.

    in your maths set up window the units drop down, mine is set to "one 0"

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #4 Re: AFR Error will not work. 
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    Im trying to use the AFR Error to adjust my maf tune will that set up still work or is that only for VE tuning?
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  6. #5 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    thats just for VE tuning.

    maf tuning you can use long term fuel trims for idle and cruise, but for wot you tune off the wideband.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #6 Re: AFR Error will not work. 
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    I understand that but couldnt i tune WOT using the MAF with the wideband?
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  8. #7 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    yes exactly what you want. my scanner set up for maf vs wb

    AFR Error will not work.-maf-vs-wb-jpg
    AFR Error will not work. Attached Images

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  9. #8 Re: AFR Error will not work. 
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    That looks just like what what i have could I possibly see the user defined math you are using for the parameter in that chart?
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  10. #9 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    the 9.7 there would be a 10 but i had to play with it a bit to make it match the scanner vs the gauge.

    AFR Error will not work.-wb-maths-jpg
    AFR Error will not work. Attached Images

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  11. #10 Re: AFR Error will not work. 
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    Imgur: The magic of the Internet This is the math for the Wideband error. the other math for setting up the wideband is exactly how mine is and just logging my airfuel ratio works fine. I cant get any logs when it comes to the error
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  12. #11 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    mine looks a bit different.

    AFR Error will not work.-wb-err-math-jpg
    AFR Error will not work. Attached Images

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #12 Re: AFR Error will not work. 
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    Do you use that to tune your VE table or your MAF?
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  14. #13 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    i did for my tahoe i VE tuned it some. same math. im just maf tuned on the regal. been thinking of toying with it on the regal but lack the caring to do so. i set it all up in the scanner so im 1/2 way there if i want lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #14 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    and my maf tuning is all ass backwards cause i spray meth. its got fuel removed more then anything else lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  16. #15 Re: AFR Error will not work. 
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    So if i set up my AFR error table like the way yours is set up i would be able to Maf tune my GP using the data acquired within that graph?
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  17. #16 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by Scottydoggs View Post
    yes exactly what you want. my scanner set up for maf vs wb

    AFR Error will not work.-maf-vs-wb-jpg
    Quote Originally Posted by Scottydoggs View Post
    the 9.7 there would be a 10 but i had to play with it a bit to make it match the scanner vs the gauge.

    AFR Error will not work.-wb-maths-jpg
    Quote Originally Posted by chrisrexmandie View Post
    So if i set up my AFR error table like the way yours is set up i would be able to Maf tune my GP using the data acquired within that graph?
    those two are what i use for maf vs wb.

    dont need the wb error for maf tuning at all. just VE tuning.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  18. #17 Re: AFR Error will not work. 
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    Hmmmm looks like the only thing different with your WB error vs Maf chart and mine is the error math i will change mine and see. It was strange how i was getting no data at all. I was told in order to tune using the maf you needed a wideband one you get to a certain HZ because then your fuel trims no longer play a role in the fueling. Was i told wrong?
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  19. #18 Re: AFR Error will not work. 
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    thats right, once you enter PE mode what ever throttle percent your set to it no longer uses the ltft's and runs off the pe file, if you zero'ed out the time vs rpm folder you"ll need to maf tune up top for sure. it will run lean on ya before a 1/4 mile is up if you dont.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  20. #19 Re: AFR Error will not work. 
    Killa Bee Scottydoggs's Avatar
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    i also log the commanded AF and the wb AF as well as the WB err in the charts area. in my bottom row of charts, you can see em in the pic there.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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