Weird Ignition after shifts in WOT under boost

soxfan143 · Post by **soxfan143** » Sun Jul 04, 2010 9:04 pm

Hello Hondata. I noticed a weird ignition graphing while logging a WOT run. If you look at times 18:347, 23:353, 23:585, 27:186 and 27:369. At the first time stamp the ignition starts at 24 degrees and it dips to 18 degrees like super fast then jumps right back to 22 degrees. It happens again 4 more times. I can feel a slight hesitation when it happens. It's not super obvious but I can definitely feel it and it's a little annoying. If you can take a look at the log to see if anything is off that would be great. Here's the cal also. Thanks guys.

One more thing I'd like to add is this never happened until I lowered my boost control frequency to 38Hz from 50Hz because I needed more resolution in the boost control.

VitViper · Post by **VitViper** » Tue Jul 06, 2010 9:28 am

I have tons of logs of N/A cars doing the same thing. I wish I had the ability to dial it out, but I fear it's one of those "working as intended" kind of things.

Post by **Hondata** » Tue Jul 06, 2010 2:14 pm

I have not seen this problem before. If this will reproduce consistently, then try re-enabling warm up ignition retard and set the ignition compensation tables back to stock.

VitViper · Post by **VitViper** » Tue Jul 06, 2010 4:33 pm

I don't think it matters what ignition table we're running. I've had this since the day I've owned my FlashPro and just shrugged it off as a weird behavior in the ECU since I could find no parameters that reference it. In all my datalogs it looks like a random 5* ignition retard after a shift... even with warm up ignition enabled. For reference, here's a datalog from a year ago when I was running 32* ignition. Ignore the fact I'm in closed loop at WOT, had a fun time toying with the lambda tables back then (hehe). And then a recent (week old) datalog & calibration that has me running 27-28* ignition. I've commented both datalogs.

I have this happening in e-tunez customer datalogs as well... It's not something that seems to affect N/A tunes negatively since it's so momentary, but I can see it being quite annoying with F/I tunes. I've seen it happening on the low cam as well. I've got dozens of datalogs showing this behavior. Kind of curious where it's coming from...

soxfan143 · Post by **soxfan143** » Wed Jul 07, 2010 5:53 pm

It does happen a lot but I can't set the ignition comp tables to stock or I'll smoke my motor. Remember I'm turbo and any slight detonation can end my day.

soxfan143 · Post by **soxfan143** » Thu Jul 22, 2010 11:17 am

I'm still getting that weird ignition between shifts, I'll post up another log in a bit. It seems to be taking ignition from the low cam for a split second after shifts. It's really strange.

soxfan143 · Post by **soxfan143** » Thu Jul 22, 2010 2:48 pm

Here is the weird ignition again. Look at the shift from 3rd to 4th right when I get back on the throttle after the shift. It dips really quick and pops back up again. This happens about half the time.