What table for open loop idle control ?

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Nov 15, 2006 | 07:48 PM

Mrbowtie26

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What table for open loop idle control ?

in ls1 edit what table has to be changed for cold start and open loop idle ? Trying to smooth out cam I have in a little.
Thanks
Ron H

Nov 15, 2006 | 09:23 PM

Mrbowtie26

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anyone ?

Nov 15, 2006 | 09:25 PM

Sean Collins

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Quote:

Originally Posted by Mrbowtie26

in ls1 edit what table has to be changed for cold start and open loop idle ? Trying to smooth out cam I have in a little.
Thanks
Ron H

There should be a Open Loop AF multiplier 3d table the name will change with software brands but it should have at least load in KPA and AF modifiers values like 1.028 etc and tempature on one axis. Higher values usually add fuel lower value take fuel out. 1.000 if the MAF has not been altered and the ducting isn;t horribly hsould be 14.7:1 regardless of what your wideband says unless you have large nonstock injectors with alot of trasient voltage lag issues.

Nov 15, 2006 | 09:27 PM

brad8266

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Its called Fuel air multiplier in LS1 Edit. That should help ya out.

Nov 16, 2006 | 06:56 AM

Mrbowtie26

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Ok, thanks for the help all.

Nov 16, 2006 | 08:29 PM

Mrbowtie26

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With the fuel air multiplier table what Kpa readings should I change for idle to reduce fuel and help idling ? Im having problems keeping it idling, I have to keep giving it gas and its running between 9 and 10 to 1 afr according to wideband .
Thanks for the help
Ron H.

Nov 19, 2006 | 08:57 PM

Mrbowtie26

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ttt....

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Nov 20, 2006 | 12:23 PM

brad8266

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Quote:

Originally Posted by Mrbowtie26

idle should be in the 25-35 Kpa area, so you are going to want to change the ~25 Kpa vs ~800 RPM area of the chart.

The root of your problem could be lying in your VE and MAF table though. Have you scanned your LTFT's lately? If they are very negative it means that the VE and MAF table values are too high, which results in a rich condition, which in turn will drive negative LTFT's in closed loop. Keep in mind that the PCM will not use the LTFT correction during Open Loop either, it will multiply straight off the values in VE and MAF, so if they are to high, the multiplication will be even higher, resulting in very rich conditions.

If your VE and MAF are off, you want to get them dialed in first, and then Open Loop cold startup AFR should lean out for ya.

Last edited by brad8266; Nov 20, 2006 at 12:30 PM.