MSPNP MSPNP specific Megasquirt related discussion.

Leaning out after AE kicks in, and when lifting throttle during cruise.

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Old 05-12-2021 | 09:39 PM
  #1  
JohnnyHess86's Avatar
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From: Central Texas
Default Leaning out after AE kicks in, and when lifting throttle during cruise.

What am I missing? I have my AE dialed in pretty well. If I am sitting still and give the engine a rev, AE kicks in, my AFRs drop to around 12.1-12.5, but immediately go max lean before stabilizing after the RPMs drop back down. I've also noticed while cruising (low or high speeds), that if I let off the throttle slightly, my AFRs jump up and I hear the engine stumble. No, it isn't my overrun fuel cut. I have that delayed 2.0 seconds right now. This happens pretty quickly when just lightly coming off the throttle.

Anyone have advice? If you must have a data log, I can post one in a couple of hours when I head back home from work. If anyone happens to respond before then, what data should I log for a good view/result? Obviously AFR and VE. Any other big ones I should log?

Thanks in advance. This forum kicks all the ***.
I'm running:
MS2PNP
GM IAT sensor
AEM X series wideband
REAL RX8 injectors
no-name intake
Old 05-12-2021 | 10:23 PM
  #2  
andym's Avatar
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Joined: May 2011
Posts: 560
Total Cats: 78
From: Miami
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I think it would help to see what your acceleration enrichment tables look like. It sounds like you might have negative AE values when it notices a negative change in map dot or tps dot
Old 05-13-2021 | 12:39 AM
  #3  
JohnnyHess86's Avatar
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Joined: Apr 2021
Posts: 19
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From: Central Texas
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Tune and data log attached!

Go easy on me y'all. I'm a newb at this stuff.
Attached Files
File Type: msq
CurrentTune.msq (119.4 KB, 33 views)
File Type: mlg
2021-05-12_22.07.39.mlg (2.12 MB, 23 views)
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