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ECMlink Car runs like sh*t after switching to O2 sim

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skatershawn

15+ Year Contributor
1,271
13
Feb 27, 2009
Austin, Texas
I dont know what happened. I moved my wideband in my front o2 spot and simulated my front o2 with my wideband. Now my car runs lean as hell and also drives and idles like complete butt hole.
I tried adjusting airflow, tried adding fuel.. At still idles lean!
Can some suggest something to me that may fix it. I cant drive it like this, it would get richer than 16:1 while cruising.
 
Im willing to bet you got the wrong wire possilby. What Wideband? and did you go all the way to the ECU and cut the wire about 2 inchs and connect it there? I did that to on mine. Till i found that out. Double check that ## on the narrowband sim wire. If you taped the WB wire on then it cant read the input
 
I didnt quite tap it, I pulled the pin and uncrimped it and recrimped it on to the egr wire. Should I just cut and solder the wire in?
About to head out and pull a log.


Edit:

Ok, so when i went out and logged this, i changed the WB switch point back to what it was set at, and it seemed to help my leanness a bit. I thought i had to set it to around 4 for the AEM WB?
It helped with the a/f mixture but, my car now accelerates choppy, and not smooth like it use to!
Also I noticed when I changed the WB switch point back down, the o2 sensor no longer moves, its stuck at .20v. When I set the WB switch point to 4.xx it was working like it should but giving my car a jacked up tune or something.

heres the log.
please dont mind the loopy idle, im trying to fix that.
 

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Did you touch any settings on the gauge it's self? Also there a few things in that log that need to be addressed. I think you might have a loose connection at the ect or a dieing ect since in the middle of the log the temp goes from 140 to 90 and back. Also you need to fix that idle. I'm also wondering if you wired it in incorrectly.
 
Im trying to fix the idle. My front o2 sensor went bad and I was suggested to simulate it with the wb rather than buying new sensor.
I cant for the life of me figure out the idle. Ive gotten tamed down but its has moments. When the car warms up it relaxes for the most part most of the time, so I was think it was the fiav. Ive replaced the tb twice, I was going to do the block off place to see if that fixed it, ive replaced the isc valve a few times with known working ones, done a number if boost leak test all holding strong.
But now I have this wb issue not helping the situation.
How should I wire the wb in? So I cut the egr wire and solder it in? I did pin #15 which is yellow and blue(egr).

Thanks for the help though guys, its greatly appriecated.


Edit:

Im also noticing what i think, and sounds like compressor surge!
when i let off the gas, a good millisecond before the BOV releases it makes a whinning, Whistle noise, Not all the time but usually anything about 4psi, when its about 10psi it will make that noise but flutters!

Why would this all a sudden start happening after moving my WB o2 sensor??
 
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