AF ratio not budging

chedst · Post by **chedst** » Tue Apr 18, 2006 3:42 pm

I have had my K-Pro installed in my Euro EP3 for about two weeks now.
I have a DC-Sport header without a cat and both stock O2 sensors is installed.
I ran the factory map initially for a short while and slightly after that a kalibration called Palmers modified 3 which is supposed to be tuned for the parts I have installed.
The car is running great and I have no knocks.
I have no flashing MIL probably because the OBDII is disabled... (Also the "Disable P0134" is greyed out)

However, my AF ratio won't change no matter how much throttle I give, it is staying constantly on 14.70:1. Even though the AFCMD is 12.46:1 the AF is still 14.70:1.
Both O2 sensors is giving voltage readings.
I also tried to enabled the OBDII to see if the AF ratio changed (even though I just ran it for 5 minutes), but it didn't.

Is there something wrong with the AF ratio reading or is the map tuned in that way that it shouldn't change?
Is there anything I should be aware of?
Is there any advantages by running with the OBDII enabled?

I am now waiting to install ITR-cams next week and after that I will get a proper map individually tuned for my car.

foobari · Post by **foobari** » Wed Apr 19, 2006 1:41 am

Euro EP3s don't have the wideband primary O2-sensor. To be able to read/datalog wb O2-values, you'll need some sort of aftermarket system, for example AEM UEGO which has it's analog 0-5V output wired into ECU's SO2-input.

chedst · Post by **chedst** » Wed Apr 19, 2006 2:57 am

Alright.. so I need a wideband lambda to tune it properly and run safely?

I drove to work this morning with the OBDII enabled. It is a 17 minute drive. The MIL did not light up.
Shouldn't it do that when there is no cat?

foobari · Post by **foobari** » Wed Apr 19, 2006 3:12 am

chedst wrote:Alright.. so I need a wideband lambda to tune it properly and run safely?

Yes.

chedst wrote:I drove to work this morning with the OBDII enabled. It is a 17 minute drive. The MIL did not light up. Shouldn't it do that when there is no cat?

Yes it should, and it will. It just takes a little bit more than that, maybe around 100km.

chedst · Post by **chedst** » Wed Apr 19, 2006 4:34 am

foobari wrote:
chedst wrote:Alright.. so I need a wideband lambda to tune it properly and run safely?
Yes.

chedst wrote:I drove to work this morning with the OBDII enabled. It is a 17 minute drive. The MIL did not light up. Shouldn't it do that when there is no cat?
Yes it should, and it will. It just takes a little bit more than that, maybe around 100km.

Thank you for your answer, much appreciated.

Is there any reason for me to have OBDII enabled before I get a wideband lambda installed?
Why is the "Disable P0134" greyed out? Or should I use the Disable "P0135"?
I have KManager v 1.2.1.5

foobari · Post by **foobari** » Wed Apr 19, 2006 5:11 am

chedst wrote:Is there any reason for me to have OBDII enabled before I get a wideband lambda installed?

You need to keep the OBD disabled anyhow, since otherwise ECU will throw a CELL because of the missing secondary lambda (which is replaced by the aftermarket wb lambda).