The one posted here 0.03913*x+9

 

Then solid 9's probably mean x is logging as zero. Log just x and make sure it is changing, might be a wiring .issue or an address setting problem

 

I am seeing the same thing. Values will also show up in map tracer but not in show log window. Kinda odd.

 

My formula ended up being:
0.03913*x+8.7
I think geographical location will determine what your formula will be. Altitude, temperature, air density and humidity will to some extend affect

Now I just need to figure out which CEL I triggered.

 

so code I threw was a P0138, anyone have any input on this? I am running OBD sim patch on ROM 96940011.

 

After running this for a few days with all fine, i applied the 02 sim patch and during my next logging session in EvoScan my AFR values were like 5-6 points low. Idling around 9.5-10 the only change was 02 sim patch. I removed patch and readings in EvoScan were back to being calibrated to gauge with original formula. Any ideas? Do rest of you leave un-patched until inspection?

 

Hi mind to share some photos on how you do the connection?
Ive some question as ive an Evo 6 ecu and on the 6 wire diagram the pin 75 is stated N/C.
My question is :
1) Do i still connect my Uego WB white wire analog output onto pin 75?
2) Hope you do kind to share some steps on how to do it in your way...

 

I have problems too, my AEM UEGO shows always 9.0 on evoscan.

The wire was checked with a tester and in idle the wire shows 2.8-3.2 volt the signal is normal I think. Is something wrong with the formula or the address I don't know, need help here.

 

Hi anyone to advise?

Thanks

 

Hi mind to share some photos on how you do the connection?
Ive some question as ive an Evo 6 ecu and on the 6 wire diagram the pin 75 is stated N/C.
My question is :
1) Do i still connect my Uego WB white wire analog output onto pin 75?
2) Hope you do kind to share some steps on how to do it in your way...

 

Can someone explain how this formula is calculated? I would like to know which numbers affect what. Thanks!


Also! How do I find the "rear O2 patch" on Ecuflash? I do not see it listed.

Thanks!

 

The equation seems to have been derived off this chart.

http://thefrost.net/randomfiles/tuni...F+R_O2_Sim.xls

Which in turn has the formula with V being volts.
0.039137255*V+10

However since X is NOT volts we'll just have to figure that out...

As noted in the graph max voltage is 5 volts which will end up being 255 in terms of X in evoscan.

Volts = X / 255;

Minimum AFR is rated to 10 in this graph and max of 19.98. So we could say that 5 volts is equivalent to 9.98 + 10 (base AFR).

Baring that in mind you'll end up with something like this

((X / 255) * 9.98) + ( 10 minimumAFR) = AFR;

We could shorten this up a lot by creating a factor for X which would be 1 unit of x

factor = (1/255) * 9.98

This ends up being 0.039137254901960784313725490196078

But to shorten that up it ends up being 0.03913*x + baseAFR. Hope that clears it up you guys can figure out the equation based on your own thoughts now.

 

Instead of cutting the ECU wiring could a T-tap connector be used instead?

If you need a visual indication:
http://www.oreillyauto.com/site/c/de...8.oap?pt=N0223

That way, if later down the road you realize this modification just isn't for you all you have to simply do is remove the connector. Splicing the wires back together wouldn't be an issue.

 

I think you can use the evo harness extenders? If a evo ecu can go into a lancer why not?

 

Bump for said question