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Has Anyone Successfully Tuned an Open-Loop Program?

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Old Sep 10, 2002 | 01:05 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

I think GeorgeC is doing this.
Get on the ls1-edit mailing list if your not already.
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Old Sep 10, 2002 | 01:21 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> how you got the car to stay in open loop.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The car starts up in open loop so try setting the conditions required for switching to closed loop (i.e. the enable temp) outside normal operating parameters (e.g. 150* Centigrade)
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Old Sep 10, 2002 | 04:36 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

A simple fix is to that is to unplug the front O2's. Then disable the codes that get thrown.
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Old Sep 10, 2002 | 04:40 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

Thanks Mike,

That is a great idea! Have you or MMS tuned an open loop program before? You are right around the corner from me...literally (I am on White Oak and Saticoy).

Thanks,

Scott
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Old Sep 11, 2002 | 12:30 AM
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Default Has Anyone Successfully Tuned an Open-Loop Program?

Hi guys,

I am wondering if anyone out there has successfully tuned an open loop setup that works relatively well.

With the switch to bigger (83 lb/hr.) injectors, it looks like I overestimated the stock computers ability to use them effectively.

I am looking for the method that you used to tune things (what tables, etc.) and how you got the car to stay in open loop.

Thanks,

Scott
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Old Sep 11, 2002 | 08:15 AM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

I am running open loop.
Nothing to it, just raise the CL enable temp out of range and use common sense.

Steve
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Old Sep 12, 2002 | 12:01 AM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

Steve,

What have you used for tuning part-throttle (excel sheets, Autotap, etc.)?

Scott
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Old Sep 12, 2002 | 02:46 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

Quick Update...

Been tuning the car in open loop mode and it is not too bad! It still runs pretty rich at idle and part throttle, but I am slowly getting it there.

The car seems to have lost the hesitation it had when running in closed loop and all the little tuning is bringing back the power.

A dedicated WB is a blessing for this kind of tuning <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Scott
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Old Sep 12, 2002 | 03:56 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

If you use the bi-directional features of EFILiveV5, you can force the PCM to operate in open loop mode while you tune.
Like this:

<img src="http://www.blacky.co.nz/free/closedloop.gif" alt=" - " />

This means there is no "fooling" of the PCM required and no trouble codes or side effects.

You can also turn fuel learn on/off for when you are tuning in closed loop mode and you don't want the ltrims interferring while you are tuning.
And you can set your ltrims back to zero whenever you want, without reseting the entire pcm or even turning off the engine.

Regards
Paul
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Old Sep 12, 2002 | 05:36 PM
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Default Re: Has Anyone Successfully Tuned an Open-Loop Program?

Thanks Paul,

But I have already invested in LS1Edit...so that is my tuning method of choice.

I just set the temp to enable open loop higher then the car will ever see to force open loop. No codes to deal with.

Scott
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