Issues around 4000 rpm while in neutral
#1
Issues around 4000 rpm while in neutral
I noticed after installing the MS3 Basic that I would get backfire type sounds in the exhaust (I think at least) around 4000 rpm. This only happens while in neutral around 4000 rpm so if I am heel-toe downshifting, blipping the throttle to rev match, or simply free-revving up to that area, I will get these sounds and be unable to rev past this part. If I am in gear and doing a pull, none of these issues exist.
I attached a data log of me free-revving up to around 2200 rpm with no issue. Then I add a little bit more throttle and around 4000 rpm it starts to make the sounds. The one strange thing I noticed in the log is that the Spark Advance dives to 1.0 when this is happening...
Any idea what the issue is? This is a naturally aspirated 1.8L NA with only bolt ons.
I attached a data log of me free-revving up to around 2200 rpm with no issue. Then I add a little bit more throttle and around 4000 rpm it starts to make the sounds. The one strange thing I noticed in the log is that the Spark Advance dives to 1.0 when this is happening...
Any idea what the issue is? This is a naturally aspirated 1.8L NA with only bolt ons.
#3
Sorry forgot about that.
Please ignore the fact that the tables are scaled for boost (while I'm N/A), my poor attempts to lean out the VE Table at the bottom right (thought maybe I was too rich there and causing a backfire, haven't reverted the settings), and the fact that the tuner only tuned for WOT. I'll be visiting a new tuner eventually but just needed the car safe for the upcoming weekend. I'm sure there are plenty of other things wrong and I'm open to suggestions
Please ignore the fact that the tables are scaled for boost (while I'm N/A), my poor attempts to lean out the VE Table at the bottom right (thought maybe I was too rich there and causing a backfire, haven't reverted the settings), and the fact that the tuner only tuned for WOT. I'll be visiting a new tuner eventually but just needed the car safe for the upcoming weekend. I'm sure there are plenty of other things wrong and I'm open to suggestions
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sickmiatabra
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04-13-2016 09:54 PM