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Stock DE motor, single turbo, low boost, UPREV tuned.
After 4k rpm ECU decides to kill power retarding ignition almost to 0 degrees. For no reason, or at least I can't see any. Boost is very low (6 psi), fuel is 100 octane, lambda 0,78 on both banks, intake air temp is 25 deg Celsious, zero knock.
no knock as in no CEL light/misfire? no audible knock? can you check your knock signal voltage - meaning you should have some voltage from the sensor...?
Knock strength signal is 0, you can see it on this graph. Also no matter how much ignition I add in the ignition table, it always drops it to 1-2 degrees on 4k rpm and some load.
how does knock strength signal relate to 0-5v such as what might be seen in the haltech? Do you want some knock signal coming in? I cant remember where I picked it up but 2.6 volts is approaching damaging knock?
Don't know how it's related to a Haltech knock signal. However, I've checked harness and replaced knock sensor just to be sure.
With that much retard, if there's a real knock, it should be audible with ears in the cabin. But according to log file, Uprev doesn't "hear" any knock, so that probably isn't reason for retarding. What else could be?
Unless I'm reading these logs wrong (kind of hard to tell) you're going VERY rich on your pulls. It looks like you've maxed out your sensors on the rich side of things. There is such a thing as knocking because the mixture is too rich, and it seems like you're in that range (depending on how much lower the readings go, because again it looks like you've maxed them out). Also remember that "knock strength" isn't the same thing as "knock count". There can be knock events without it being read in knock strength. This is almost certainly tune related.
For tuning I'm using VEMS Round stand alone wideband controller. AFR is set to 11.6 to 11.8 on boost (lambda 0.78 to 0.8), which is quite normal for boosted engines.
Shown on this log are OEM widebands which aren't accurate above certain AFR point.
Problem solved?
I have similar trouble on my G35tt, timing drop to -10 only when load raise very fast..when i downshift and snap gaz pedal to the floor?!?
03-31-2017, 01:02 PM
UPREV retards ignition and kills power
