A4 KR when shifting
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
A4 KR when shifting
I have a Magnacharged 2000 A4 that has a Rossler transmission and
sometimes when it shifts I get around 4 degrees of KR during the shift.
Iam pretty sure it has to be a mechanical problem since Iam running on
race gas with 16 degrees advance. The KR usually occurs during the
1st to 2nd shift. I shift at 6400 and was wondering if I could program
the car to eliminate KR by changing the shift characteristics such as
rpm, delay and pressure. The delay and pressure are set to stock since
Rossler does not recommend changing these parameters. Has anyone
experienced this and fixed it by programming ?
Thanks >>>>> INTHERED
sometimes when it shifts I get around 4 degrees of KR during the shift.
Iam pretty sure it has to be a mechanical problem since Iam running on
race gas with 16 degrees advance. The KR usually occurs during the
1st to 2nd shift. I shift at 6400 and was wondering if I could program
the car to eliminate KR by changing the shift characteristics such as
rpm, delay and pressure. The delay and pressure are set to stock since
Rossler does not recommend changing these parameters. Has anyone
experienced this and fixed it by programming ?
Thanks >>>>> INTHERED
Premium Supporting Vendor
Joined: Mar 2001
Posts: 5,241
Likes: 21
From: Knoxville Tennessee
Have you scanned the car and confirmed it is truely knock or is it from the delta air table not being modified?
Just curious if the car has always done it or just recently started.
If you have a log that can be helpful as well.
Just curious if the car has always done it or just recently started.
If you have a log that can be helpful as well.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
Originally Posted by BLOWNZO6
Have you scanned the car and confirmed it is truely knock or is it from the delta air table not being modified?
Just curious if the car has always done it or just recently started.
If you have a log that can be helpful as well.
Just curious if the car has always done it or just recently started.
If you have a log that can be helpful as well.
spark advance by the KR amount. I do have a log file but I don't think
that I have file attachment privledges. I could email it to you ?
INTHERED
Premium Supporting Vendor
Joined: Mar 2001
Posts: 5,241
Likes: 21
From: Knoxville Tennessee
Originally Posted by INTHERED
I scanned the car and it does show up as both KR and a reduction in
spark advance by the KR amount. I do have a log file but I don't think
that I have file attachment privledges. I could email it to you ?
INTHERED
spark advance by the KR amount. I do have a log file but I don't think
that I have file attachment privledges. I could email it to you ?
INTHERED
I don't know much about A4 tuning, but I can help you out if there is something outstanding as far as the tune goes.
EDIT.. also is it something that just started or something that has been happening the whole time?
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Originally Posted by BLOWNZO6
is it from the delta air table not being modified?
.
.
im having some kr issues with my kids car and i cant shake it.....
i've seen the parameters in hpt but dont know what they mean or what function they provide...
thanks bro.
dan
sorry for the partial thread jack, but the info might be useful to other also..
peace
Melting Slicks
Joined: Sep 2005
Posts: 3,082
Likes: 0
From: eagle mountain utah
Immitation KR
The knock sensors react to a very narrow band of frequencies. At initial startup, they adjust themselves to the frequencies from the motor. Anything that can produce the frequency that they are tuned for will fool the knock sensors. A vibration from a part going bad?
Premium Supporting Vendor
Joined: Mar 2001
Posts: 5,241
Likes: 21
From: Knoxville Tennessee
Originally Posted by usd2sing
hi Nick....im curious about this statment....could you explain?
Hope that helps.
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Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,070
Likes: 9
From: MARRIOTTSVILLE MD
Originally Posted by BLOWNZO6
There is a Burst Knock Retard Table. I had some mystery knock once in a while on my car and RoadRebel pointed me toward this table. This does not show up as knock in the normal KR PID log. If the change in cylinder air is greater than this threshold for a given RPM it will pull timing based on the amount allowed in the next table down. I opened them all up and the location in HPT for you to see where to find it. I went through my log and looked at what the change in air was for my part throttle and full throttle pulls and modified from there.
Hope that helps.
Hope that helps.
Thanks >>>>> INTHERED
