TPS based AE trouble.
#1
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Have got my car running on a DIYPNP, bone stock 99NB, and I think I've got the VE table worked out for the most part, but I'm having trouble understanding TPS AE. When I smack the throttle I get a sudden lean condition, the my AE kicks in and then suddenly it pegs rich. The car seems to rev freely, but in the log it looks like i drop maybe 20-30 rpm when I initially smack the throttle then the RPMs climb. I'm a newb at this tuning stuff, so please flame lightly, slight roasts only. I have attached most recent log and MSQ.
#2
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It took me a while to figure out exactly what is being targeted. I always thought you were trying to get rid of the lean spike, truth is afr doesn't matter at all for AE. What you are trying to do is get the rpm to rise as close to the initial crack of the trottle. I like to log PW, TPSdot, and RPM (as I only use tps, no map). You then try to get the rpm to rise as quickly and smoothly after as possible. Laggy rpm increase is too rich, dip before rise is too lean. Someone else correct me if I'm wrong, but this is how I understand it.
Also I have no way to look at your tune, so I'm just throwing this out there. AE is the last thing you tune, your VE table (if its not smooth and well done) will heavily effect AE tuning.
Also I have no way to look at your tune, so I'm just throwing this out there. AE is the last thing you tune, your VE table (if its not smooth and well done) will heavily effect AE tuning.
#3
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This is also how AE was explained to me, but I just want some input on if I'm on the right track, Want to be dumping the correct amount of fuel. My VE is smooth and I'm only adding 0.9 ms PW at 30%/s TPSdot and 2.5 ms PW at 1000%/s TPSdot .
Last edited by MasMiata; 05-02-2019 at 12:35 PM. Reason: grammar
#9
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It's what I've found to work so far as a decent starting point. It was also recommended in a video that was linked once, https://www.youtube.com/watch?v=HSE3CxaWF-I&t=748s. YMMV. My beginning values are decent for getting very little dip and a decent response. Try things out and see what works for you.
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