Lean closed loop operation

Tsuchinoko · Post by **Tsuchinoko** » Wed Feb 16, 2011 2:11 am

I have the open loop map well tuned and now i want to enable the closed loop operation but when i switch to closed loop the afr goes very lean at the graph is it possible to see that no corrections are being done at short term or long term.

I'm using wideband input to closed loop operation, the target voltage is 2.34v.

Any clue?

AREA876 · Post by **AREA876** » Wed Feb 16, 2011 4:54 am

Post calibration and state the brand wideband you are using.

Tsuchinoko · Post by **Tsuchinoko** » Wed Feb 16, 2011 5:13 am

Thanks to your reply

My wide band is from Innovate.

AREA876 · Post by **AREA876** » Wed Feb 16, 2011 6:06 am

Recommend you use a wideband input soucre other than D14 for a better range. Veiw changes made to close loop and you can try these settings.

Tsuchinoko · Post by **Tsuchinoko** » Wed Feb 16, 2011 7:05 am

That changes made in the conversion table can be used for closed and open loop right?

In my ECU i don't have wires on the D10 or D12 so i must keep the D14 and this one only goes to 3,8 volt right?

Thanks for the reply's do you work for hondata?

AREA876 · Post by **AREA876** » Wed Feb 16, 2011 7:36 am

Tsuchinoko wrote:That changes made in the conversion table can be used for closed and open loop right?

In my ECU i don't have wires on the D10 or D12 so i must keep the D14 and this one only goes to 3,8 volt right?

Thanks for the reply's do you work for hondata?

Yes settings can be used for close and open loop.

You can add the wires (D10, D12, B6)

Which ECU are you using?

No I don't work for Hondata, but love working with the product.

AREA876 · Post by **AREA876** » Wed Feb 16, 2011 7:54 am

Try this setting for D14

Tsuchinoko · Post by **Tsuchinoko** » Wed Feb 16, 2011 8:29 am

I was asking that because you was more helpful than they use to be, that's why i ask that.

About the D14 i change the setings on the innovate LM programer to:
0v - 7,35 afr and 3,8v - 22.39 afr. I think is not a issue to use D14.

Post by **Spunkster** » Wed Feb 16, 2011 10:23 am

It would be best to use one of the inputs that has the full 0-5v range. This will give you the best results and is what the closed loop wideband functions were designed with. It is not difficult to add a wire or swap the wire from one location to another.

See the Help file for any changes to the ECU that must be made for the input you choose to use.

Tsuchinoko · Post by **Tsuchinoko** » Wed Feb 16, 2011 12:58 pm

I can't understand why but is not working.

The conversion table i have set to:
0 - 1.89 - 3,78
7.35 - 14.87 - 22.39

Voltage target: 1.88v

Should work with this values but i didn't goes strait to 18.xx afr...

I double check all the wires and they are well connected.

AREA876 · Post by **AREA876** » Wed Feb 16, 2011 4:01 pm

Tsuchinoko wrote:I can't understand why but is not working.

The conversion table i have set to:
0 - 1.89 - 3,78
7.35 - 14.87 - 22.39

Voltage target: 1.88v

Should work with this values but i didn't goes strait to 18.xx afr...

I double check all the wires and they are well connected.

Best add wire and use a different input. When using other input use logworks AFR reading to determine if you have to remove resistors from ECU to get readings to match with Logworks. Also set LC1 back to defauft setting and set conversion tables to
0 - 2.43 - 5.00
7.35 - 14.7 - 22.39

Tsuchinoko · Post by **Tsuchinoko** » Thu Feb 17, 2011 2:26 am

Strange is that i already had closed loop ok with this settings before my last WB sensor death. When i bought this one, same part has the last one, stopped working well. I only changed one for another and made the inicialization procedures!!

Will_B18C · Post by **Will_B18C** » Sun Feb 27, 2011 9:12 am

Tsuchinoko wrote:Strange is that i already had closed loop ok with this settings before my last WB sensor death. When i bought this one, same part has the last one, stopped working well. I only changed one for another and made the inicialization procedures!!

I had the same problem with the open loop and close loop tuning.
Tune in open loop and goes lean when I enable close loop.

The solution I have is to tune the engine in close loop while the short term trim is set to 0% for min and max fuel trim.

Remember to reset the ecu before tuning.

Once the tuning is done, I set the short term adjustment back to -30% and +30%.

Tsuchinoko · Post by **Tsuchinoko** » Mon Feb 28, 2011 9:20 am

Thanks for your reply.

I have a try.