markmurfie
Well-Known Member
On my second look at your data zap, First knock event looks to be caused by a lean AFR for start of WOT. Are you using the stock thermostat or an even flow 160*? Engine coolant temps are shooting up towards the end of the pull. This is some what normal but your curve is excessive. Since you are not running an excessively lean WOT lambda my guess is you either have an air bubble in your coolant system, low coolant system pressure(leaky cap), or an under performing thermostat. The excessive heat generation is my guess at the higher RPM knock. You can just keep looking for loose parts all tho those usually max out the knock sensor.I have it my other logs too. I am thinking it is either exhaust rattle, or drive line vibration. Where are the knock sensors located?
adding picture of what my 170* thermostat coolant temp does to compare to your logs.
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