running lean when commanding rich
some strange things I've notice
1. As soon as AFR is commanded to 11.3 in response to WOT actual LC-1 AFR goes lean.
2. uneven o2 voltages
3. KR and LTFT result of lean condition
Questions: Could my water injection change AFR readings?
Is this what a dirty fuel filter looks like?
How is TRQENG calculated?
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1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
I think you may have an air leak in your system...
How does it run below 3000rpm...Slightly lean?
American Muscle, European Design, Japanese Tactics
its a little rich while cruising
Not sure why LTFT goes to 25% if VE is accurate. AutoVE was done 2 days ago.
inaccurate TRQENG is messing with my transmision pressures
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1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
WTF, I turned off fuel trims. PE is in EQ ratio. Yet AFR hits 19's during PE.
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1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
Put a fuel pressure gagge on it and have an assistant monitor it during WOT. I can't look at your logs here, where is your pulse width duty cycle? Make sure that the water injection is off too.
Al
"Trash that carb and get Injected!"
pressure is steady 52lbs and I changed the original fuel filter
Tuned the autoVE file to include PE and things are better. I had hoped the knock would go away, especially with the winter anti freeze spay on. Time to try a different mix I guess. This was with 87 octane though. I suspect the MAF now.
____________________________
1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
Your WOT AFR looks much better with that last tune/scan. You're still getting 8 degrees of knock retard. That's way too much. I'd go back to the stock spark table and slowly add it back in the WOT areas. In cool weather like that you shouldn't have any KR at all.
Also, your injector pulse width is very high and it would appear that you are out of injector. I should know because I'm out as well. (see attached log) My peak numbers are IPW 18.9 ms @ 97 % duty cycle. Your max IPW is 19.9 ms. That's not good. Log the INJDC1 pid next time to see what's going on there. This could be contributing to your knock as well.
And another thing... I noticed that your shifting first at 6700. I hope you have some beefy valve train work done to spin it that high!
Dan
Last edited by white01ss; June 12th, 2008 at 04:21 AM.
2001 Camaro SS
Built 370 LQ9, Ported 243s, D-1SC 14 psi. 691 rwhp, 643 rwtq
Best time: 11.6@124 on nitto drags with a 2.1 60'
"if you're gonna build a time machine into a car, why not do it with some style." Dr. Emmett Brown
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