KR problem right off idle, any ideas on how to get rid of it
Thread Starter
TECH Senior Member
iTrader: (16)
Joined: Oct 2002
Posts: 6,907
Likes: 6
From: Albuquerque, NM
KR problem right off idle, any ideas on how to get rid of it After a very successful day of tuning with a local tuner, we have my car operating pretty damn good. KR was popping up everywhere at the beginning of the tuning session, but we finally got it under control and is all but eliminated.
There is no KR at all except for right off idle. If I load up the torque converter to about 1800rpm it'll happen. If I take off from a light and hit those cells, it'll happen.
KR in that small area goes up to 14-15 degs. We've taken out timing, it still happens, we've added fuel in that range, it still happens.
We decided to call it a night after a long day of tuning. Any ideas on what we are dealing with and how to get rid of it?
Were using HPT if it matters.
Thanks.
There is no KR at all except for right off idle. If I load up the torque converter to about 1800rpm it'll happen. If I take off from a light and hit those cells, it'll happen.
KR in that small area goes up to 14-15 degs. We've taken out timing, it still happens, we've added fuel in that range, it still happens.
We decided to call it a night after a long day of tuning. Any ideas on what we are dealing with and how to get rid of it?
Were using HPT if it matters.
Thanks.
Thread Starter
TECH Senior Member
iTrader: (16)
Joined: Oct 2002
Posts: 6,907
Likes: 6
From: Albuquerque, NM
Nope not audible to either of us and sadly they are 98 sensors. If its burst KR or tip in KR how can we tame this?
Man i'm drooling right now because my car is sooooo close to being tuned and that means time to go to the track....and dyno
J
Man i'm drooling right now because my car is sooooo close to being tuned and that means time to go to the track....and dyno
J
i am having the same problems. except mine is happening up high. soundengineer is trying to help me, but i am 2 and half hours away from my car ( at college UCSB) so i am working on it when i am down there visiting. try pm him.
Just to save aggravation you probably ought to
swap out for the later version knock sensors. But
those seem generally to hit people higher up in RPM.
Off-idle KR is most likely a lean hole that comes
from the VE table being short/low in that area.
Look at the logs, 1-3 frames prior to the KR "hit"
and see if your O2 voltages have dropped below
200mV. If so, feed it some more at the RPM*MAP
indicated at the point of dip and smooth in the
surroundsing region to the new value.
swap out for the later version knock sensors. But
those seem generally to hit people higher up in RPM.
Off-idle KR is most likely a lean hole that comes
from the VE table being short/low in that area.
Look at the logs, 1-3 frames prior to the KR "hit"
and see if your O2 voltages have dropped below
200mV. If so, feed it some more at the RPM*MAP
indicated at the point of dip and smooth in the
surroundsing region to the new value.
