VE Correction
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VE Correction Is there any way to log VE correction? Also, are there VE correction cells similar to FTC's?
When I tuned my VE table, I set the VE correction uppper and lower limits to 1.001 and .999 respectively to essentially take VE correction out of the equation. I then re-enabled my MAF and got my fueling inline with the MAF enabled. Now I decided to set the VE correction limits back to stock, and all of a sudden my fueling is completely jacked up. Im hitting AFRs of 18:1 at idle. How can I log VE correction to try and square things up?
When I tuned my VE table, I set the VE correction uppper and lower limits to 1.001 and .999 respectively to essentially take VE correction out of the equation. I then re-enabled my MAF and got my fueling inline with the MAF enabled. Now I decided to set the VE correction limits back to stock, and all of a sudden my fueling is completely jacked up. Im hitting AFRs of 18:1 at idle. How can I log VE correction to try and square things up?
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Whats "Lift" tuning??? Never heard of that.
Anyway, the VE table was tuned in SD (MAF Unplugged) with the correction factor effectively disabled (set limits close to 1). I then tuned it using the MAF and got that in line. Then when I set the VE correction limits back to stock, the tune went out of whack.
Anyway, the VE table was tuned in SD (MAF Unplugged) with the correction factor effectively disabled (set limits close to 1). I then tuned it using the MAF and got that in line. Then when I set the VE correction limits back to stock, the tune went out of whack.
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But now that I understand what youre saying, yes, im quite familiar with the process.
Although may I suggest this to you for future: I find its easier to set your LTFTs to 0 and lock them, then just log STFT averages. Much quicker process, and better resolution, since youre not locked into FTCs.VE correction is somthing a little more advanced than basic VE table tuning. The correction factor is a multiplier thats used by the ECU to get dynamic airflow and your maf readings to match. Lets say your MAF is telling you that your flowing 2.5 g/sec, but your dynamic airflow reads 2.0 g/sec (based off of VE and rpm). The computer would [supposedly] adopt a VE correction of 1.25. Heres an equation: [Dyn Air] x [VE correction] = [MAF].
My question is that if the VE and the MAF tables were dialed in, why would the VE corection stray so far from 1.000 once it was re-enabled?
Last edited by GuitsBoy; May 7, 2008 at 11:35 AM.
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From: Long Island, NY
I disabled the MAF again to check my speed density tune, and so far everything seems normal in SD world.
