2500-3000 rpm weird lean condition 2014 ctsv

fix your VVE there is a lean pocket if you look closely around the cruise area. also if its cammed work on your EOI

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Originally Posted by SultanHassanMasTuning

fix your VVE there is a lean pocket if you look closely around the cruise area. also if its cammed work on your EOI

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Stock cam. My vve is disabled by the time this lean condition is happening

So I just tried to see if this lean condition happens in OL and it sure does....

Any other ideas?? I even put the stock tune back in (including the ID850 injector data) to see it was something that I did and that lean condition is STILL there. Could it possibly be a clogged injector?? I'm grasping at straws here....

Current tune and log

How is it doing with the ZL spark table?

honestly it feels alot better...i mainly did it because in the mid range area they have alot more timing. So I decided to give it a go. I'm happy with it and probably will stick with it. Just remember I copied only a portion of that table..my high load areas I left alone since I'm running a 2.35 upper

I may try it also. What range did you use? I know high load would be a no go... With the crappy 91 gas an AZ I am limited anyway. Will be moving to MO in a few weeks and am looking forward to 93 again.

Just out of curiosity, try zero-ing everything under the prediction coefficients heading on the airflow/dynamic tab. My weird lean issue wasn't presenting exactly the same way as yours, but killing ALL of these predictive coefficients seems to have fixed it with no ill effects. I just got this figured out today with my tune (thanks to jsllc for the guidance in the right direction), and can finally move on with my tune. Maybe it will fix your issue as well- can't hurt to try.

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Originally Posted by RobZL1

Just out of curiosity, try zero-ing everything under the prediction coefficients heading on the airflow/dynamic tab. My weird lean issue wasn't presenting exactly the same way as yours, but killing ALL of these predictive coefficients seems to have fixed it with no ill effects. I just got this figured out today with my tune (thanks to jsllc for the guidance in the right direction), and can finally move on with my tune. Maybe it will fix your issue as well- can't hurt to try.

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unfortunately I've tried that already and still have the same weird jagged afr issue. I wish it was that easy for me...lol

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Originally Posted by PGA2B

I may try it also. What range did you use? I know high load would be a no go... With the crappy 91 gas an AZ I am limited anyway. Will be moving to MO in a few weeks and am looking forward to 93 again.

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Basically where that big hump is in the timing graph is what I used. I don't have my tuning computer with me but I can give you more exact values when I get home from work

Please do. I out of town until next weekend anyway so I can't make any changes...

Thanks!