O2's Junking Out???
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 93
Likes: 0
From: Arcadia, CA
O2's Junking Out??? Doing some ls1 edit tuning on the car (B1, TTS, Loudmouth, Whisper Lid, Ported TB, free mods, 91 Octane) and I started getting into fuel mapping.
Anyways I rescaled the injectors by 93% which gave me 0%,-4%) Ltrims. WOT was in the .980mv-1.01mv <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> range and timing was down to 21 degrees advance so multiplied PE Rpm by 84%. (Blunt knife tuning I know but I'm just trying to baseline, besides Im scared of excel bad college experience
)
Then the 02's got funky. Starts out @ 2500rpm .740mv <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> b1, and .830mv b2, but no knock retard or audible pinging and getting full stock timing. Then the 02's gradually rise to .880mv .915 @ 4800rpm. Then jump to .940mv .970mv from 5200-6800, still full timing. Car feels strong no hesitation or flat spots. What gives?
At first I even did 80% PE and saw some .680-.730 02's with no knock or pinging. Kinda fishy if you ask me.
Are my O2's junking out and/or is my edit tuning a lil rough edged. I took out another 4% PE from 5200-up. I figure if I'm not getting any knock then it's most likely running pretty good. I'll know for sure Saturday when I get it dynoed and WB'd.
Anyways I rescaled the injectors by 93% which gave me 0%,-4%) Ltrims. WOT was in the .980mv-1.01mv <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> range and timing was down to 21 degrees advance so multiplied PE Rpm by 84%. (Blunt knife tuning I know but I'm just trying to baseline, besides Im scared of excel bad college experience
) Then the 02's got funky. Starts out @ 2500rpm .740mv <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> b1, and .830mv b2, but no knock retard or audible pinging and getting full stock timing. Then the 02's gradually rise to .880mv .915 @ 4800rpm. Then jump to .940mv .970mv from 5200-6800, still full timing. Car feels strong no hesitation or flat spots. What gives?
At first I even did 80% PE and saw some .680-.730 02's with no knock or pinging. Kinda fishy if you ask me.
Are my O2's junking out and/or is my edit tuning a lil rough edged. I took out another 4% PE from 5200-up. I figure if I'm not getting any knock then it's most likely running pretty good. I'll know for sure Saturday when I get it dynoed and WB'd.
Re: O2's Junking Out??? I did 8 pulls on a wideband the other day and my O2s were never stable, even though the changes to my A/F were small and my A/F remained in a fairly narrow band.
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 93
Likes: 0
From: Arcadia, CA
Re: O2's Junking Out??? I dynoed it today and found out they are JUNK. O2 milivolts ranged from .650-1.0 <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> while 100% wot. According to the wideband O2 more or less stayed 13.0:1.
Then my ls1 edit wouldn't work, almost fried the pcm and the car wouldn't start, but saved with a fuse reset. Got off the dyno and whadda ya know ls1 edit worked fine. Redid a quick pe fuel map and the car ran leaner and also unstable on the wideband DOH! o2 range from 15.7:1-13.0:1, but no knock retard or pinging. Car still put down 371rwhp 368 rwtq. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Needless to say I'm gonna try and tune richer and shoot for .900's if possible.
Then my ls1 edit wouldn't work, almost fried the pcm and the car wouldn't start, but saved with a fuse reset. Got off the dyno and whadda ya know ls1 edit worked fine. Redid a quick pe fuel map and the car ran leaner and also unstable on the wideband DOH! o2 range from 15.7:1-13.0:1, but no knock retard or pinging. Car still put down 371rwhp 368 rwtq. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Needless to say I'm gonna try and tune richer and shoot for .900's if possible.
