Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Eliminating Closed Loop....

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Old Sep 15, 2002 | 09:33 PM
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csabatka1's Avatar
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Joined: Jun 2000
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From: Maryville, MO/Seward, NE
Eliminating Closed Loop....

I had some helpful threads saved before the board change-over and now I can't get access them anymore because of the switch.

Anyways, I have a couple questions...

My car is running extremely rich in closed loop. I'm experiencing low gas milage, horrible exhaust smell, stumbling, sputtering, ect while until 2/3 throttle. At WOT it runs fine. I had new plugs with the motor and I just replaced them at 350 miles and they we extremely fouled.

What's the best way to eliminate closed loop via tunercat? I noticed there were a couple setting that probably would work.. ex-> 'min temp for closed loop'....set that to an unreachable temp like 400*.

Would there be any other tables or settings I'd need to change in order to rid closed loop entirely. I know I would have to fill in the open loop tables from 100-7k rpms.

Right now I have a wideband o2 dyno session scheduled to help out with tuning this.

Also, anyone have their tables I can look at?
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