Series I Engine Tuning Forum EMS (Flash Tuning, Interceptor, Piggy Back, Stand Alone)

Factory PCM knock control discussion

Old 04-03-2014, 11:12 AM
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Extremely late,

I resolved this issue by replacing the knock sensor from a spare motor I had.
all seems to be fine now
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Old 04-03-2014, 04:05 PM
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Originally Posted by cwatson View Post
So, sorry to bring this up from the dead:

Am I to understand the cobb does not log knock retard because it has filtered out all values below 10? And our knock retard is negated? Is there a workaround for this? I was thinking of getting an AP but am not very comfortable tuning w/o being able to monitor knock levels.
Yes, the cobb does not log knock retard properly. It cannot be used as a tuning aid, and many tuners have inadvertently overridden stock knock control by advancing until knock control cannot retard any more. There is no current workaround.
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Old 05-27-2015, 01:10 AM
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Originally Posted by oltmann View Post

For negative RPM deltas, more advance increases engine braking.

I realize this is old, but if you're snooping around. Why is this? I would think it does nothing since there is a fuel cut during engine braking.
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