full ol

[drdarthinvader]

whats the easiest way to disable stfts at idle. im running ol cos3 but would like to get some accurate readings from my wb lc1 at idle instead of mapping stft .after doing an auto ve i can enable stft?

[swingtan]

Easiest way is to use DVT's to force OL.

If you want a slightly more permanent solution, command anything other than Stoichiometric and it'll go into OL.

Simon.

[Aloicious]

Easiest way is to use DVT's to force OL.

If you want a slightly more permanent solution, command anything other than Stoichiometric and it'll go into OL.

Simon.

you also can force a "permanent" OL in COS3 and still command Stoich. you basically have to go and zero/disable ALL O2 sensor tables. I've been running like that successfully for 8 or 9 months. its easier for me that way so I can just command what I want to command, and still have the trims disabled.

[drdarthinvader]

b4105 o2 switch point set to 0 (lean)therefore disabling stft..ok that will allow the pcm to choose b3647 which would be the richest table as fuel reference

[mr.prick]

{B4206}
When disabled, the PCM will always use
- {B3605} Commanded Fuel When in Open Loop (Normal) or
- {B3647} (not available in OS 12212156) as the fuel mixture table without any O2 feedback as long as table
- {B4205} Closed Loop Temp Enable is also set to it's maximum value.
If this parameter is enabled then O2 feedback (STFT) will be used with the Open Loop table.
If you wish to run total open loop disable this parameter and set
- {B4205} Closed Loop Temp Enable to it's maximum value.

[joecar]

With any of the COS's, commanding EQ 1.00 in B3647 will give you STFT trimming in OL... so watch out for this.

[drdarthinvader]

thanks for the replies i had stft correction at idle to part throttle and once changing b3647 to 14.70 through to wot 11.70 gave me stft correction at idle only .
i changed b3607 to 14.70 which disabled stfts at idle using commanded fuel table only .now running full ol