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Tuner in Training
Cavalier 2001 2.4l LD9 - Lots of KR
I'm having what I think is the phantom knock problem with the LD9.
I did many drive of 1 hour cruising at highway speed while logging and have lots of KR all over the place... I did take a few time between 3* and 5* and it made not much difference.
I read once that there might be a way to lower the knock sensor sensitivity... Do one of you would know something about this?
Any help is appreciated.
Last edited by GTP@2727; 03-21-2013 at 07:29 AM.
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Senior Tuner
File and Log?
These are bad for #3 Bearing going out.
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Tuner in Training
here you go... they are from last spring as I parked the car during the summer not having much time to spend on it...
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Senior Tuner
- List Mods
- Get a wideband
- Start with VE Tuning
- Copy High Spark to Low Spark Table(even Alc tables) When Tuning Spark make changes to all tables.
- Have a Read Here http://www.hptuners.com/forum/showpo...9&postcount=21
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Tuner in Training
1. Cold Air Intake (AEM brand) and MagnaFlow CatBack exhaust...
2. I have the DynoJet wide band but I haven't installed it on the car. but will do for sure.
Have you seen similar KR problem before when tuning?
I appreciate your help and will definitely look at VE tuning. Should I consentrate on VE and once done move on to Spark tuning? or should I try do both at the same time?
I'm planning to do off-road track racing with this car.
thanks
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Senior Tuner
get the WB in, and then read that link and start with VE.
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Tuner
I ran into a similar prob. with another j-body....different motor, but same symptoms.
As an experiment, set your timing to something ridiculously low, that would have absolutely no chance of causing legitimate knock retard....eg. 5-6 deg. I'm guessing it makes absolutely no improvement to the kr you're seeing. It appears from your log that the kr the car is seeing happens in direct relation to putting a load on the powertrain. Each time the tps goes up, kr goes up. If altering the timing as I suggested above doesn't get rid of the issue (& I don't think it will), go over the car looking for bad motor mounts etc.
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Tuner in Training
This is very interesting Shane.... you got it right as the KR occurs under load. As soon as I take take my car out I will try with your suggested timing... until then I will spend some time to look at the motor mounts.
thanks for the info!
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Tuner
The LD9 likes to have ghost knock.
Lowering the knock sensor sensitivity will help.
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Tuner in Training
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Tuner
Originally Posted by
GTP@2727
how can I do this?
Go to the Spark Tab, then Retard, Then Base Retard table, lower that number. Maybe 10-20%