Running Rich? High LTFT and High 02 mV??

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Mar 30, 2006 | 08:23 AM

hatdragracer

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Running Rich? High LTFT and High 02 mV??

I have read the stickies and am still a little confused

My average LTFT are 7% bank 1 and 9% Bank 2 which indicates lean, but my 02 mv are way rich 850 - 940.

I was going to use the MAF table and multiply up by 110% to get negative LTFT's, but if my 02's say I'm rich will I just fould plugs and 0s's

Car runs OK, idles low and the mileage sucks since I installed he header and ORY, AIR and EGR also removed.

Also once at full throttle it went open loop and one at idle went open loop in my last data run.

Car it throwing no codes

If it matters I am using LS1Edit and Autotap

Mar 30, 2006 | 08:23 PM

brad8266

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Maybe you need to swap out the O2's and plugs, it cant hurt especially if the ones you have are old anyway. Then try again and see where the trims are at.

Mar 31, 2006 | 08:59 AM

hatdragracer

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Plugs and 02 are brand wew, the 02's are the 33111 variety if it matters

Mar 31, 2006 | 09:16 AM

oange ss

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pcm is correcting for a lean condition (+ trims) that's why your runnin rich

Mar 31, 2006 | 06:44 PM

SSpdDmon

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Can't tune WOT with stock NBO2's. Get the cruise fuel trims (bellow 4,000 rpm) down to -2 to -4. Buy a wideband to check/adjust WOT and be done with it.

Mar 31, 2006 | 07:29 PM

white2001s10

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Sounds like exhaust leaks near the heads. Get rid of those and start using a wideband.

Mar 31, 2006 | 08:37 PM

hatdragracer

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From: Houston, TX

I drove car for about 50 miles and averaged my LTFT's in MAF and SD modes

I corrected the VE table per many a wise person on this forum..today my LTFT's were very near 0 and slightly negative...what a difference.

I hope it stays and I can begin tuning WOT...I will drive it like this for a week and re-check my LTFT's

I don't know why it worked, but I guess ignorance is bliss.