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 False Knock Retard
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mag
P Plater



15 Posts

Male

Posted - 24 Jun 2011 :  11:10:44 AM  Show Profile Send mag a Private Message  Reply with Quote
 
Anyone had experience with false knock retard because of noise from valkve gear, bearings or piston slap. Get periods of upto 8 deg retard when auto up changes & during light load cruise. No problem under heavy load. May be auto up change & cruise condition allows the loose bits to clank about more which the knock sensor thinks is detonation.
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VNSVLE
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smiley-blunder

1316 Posts

Male

Posted - 24 Jun 2011 :  2:57:39 PM  Show Profile Send VNSVLE a Private Message  Reply with Quote
 
What symptoms do you have and how are you checking timing while on the road??
cheers
 

What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared.
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mag
P Plater



15 Posts

Male

Posted - 25 Jun 2011 :  11:02:04 AM  Show Profile Send mag a Private Message  Reply with Quote
 
I'm running TunerPro RT & looking at the log files. The car drives as normal just that since I recently started logging the knock retard data I am getting retard at freeway cruise & just before the auto up changes. Cannot get the 35-40 deg cruise timing I would expect, lucky to see more than 30 degrees before retard kicks in. Intend to try some 98 octane to prove it is false knock from the sensor but interested to know if anyone else has had similar problem.
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VNGRPA
Fully Licenced


monsters-skull

426 Posts

Male

Posted - 25 Jun 2011 :  12:05:19 PM  Show Profile Send VNGRPA a Private Message  Reply with Quote
 
at the moment i am reading up on EFI Tuning Tips (especially GM EFI) as i would like to buy a tuner-pro RT myself
i don't now if it will help you mate but check this out never know it might just help you out

http://www.diy-efi.org/gmecm/papers/tunetip.html
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mag
P Plater



15 Posts

Male

Posted - 25 Jun 2011 :  7:16:32 PM  Show Profile Send mag a Private Message  Reply with Quote
 
VNGRPA thanks for the reply. If you are only interested in logging to start with, then use TunerPro. You will need an interface to the ALDL. TunerPro RT is only required if you are doing real time mapping. Both TunerPro & RT are free if you are happy to log-on everytime you want to use it.
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