Picking up "phantom" knock
May 7, 2013, 07:53 PM
#16
Knock voltage will determine alot. I place almost no faith in det cans either as I have seen motors with "no noise" be subjected to 35psi on pumpgas. A log still tells alot even if the tuner feels it is knock free.
Loose knock sensor will pick up more noise than a tight one.
A bad ground or defective knock sensor will do the same thing.
The shape of the voltage curve can tell stories as well.
Loose knock sensor will pick up more noise than a tight one.
A bad ground or defective knock sensor will do the same thing.
The shape of the voltage curve can tell stories as well.
Last edited by JohnBradley; May 7, 2013 at 07:56 PM.
May 8, 2013, 12:35 AM
#17
Evolving Member
Thread Starter
Knock voltage will determine alot. I place almost no faith in det cans either as I have seen motors with "no noise" be subjected to 35psi on pumpgas. A log still tells alot even if the tuner feels it is knock free.
Loose knock sensor will pick up more noise than a tight one.
A bad ground or defective knock sensor will do the same thing.
The shape of the voltage curve can tell stories as well.
Loose knock sensor will pick up more noise than a tight one.
A bad ground or defective knock sensor will do the same thing.
The shape of the voltage curve can tell stories as well.
May 9, 2013, 10:04 AM
#20
Evolving Member
Thread Starter
Yeah I'm glad i found the issue.Luckily i had a new donut gasket and installed it so it pushes the downpipe down a bit.And this time i didn't clamp the downpipe as hard against the O2 Housing.
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