weird safc knock reading (searched) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

matt87 · 04-27-2006, 12:30 PM

I have a safc2 hooked up a s13 redtop and lately its been showing weird knock on the safc. Im not really concerned about it becasue i heard its not to trustable and its not high levels of knock.
When the car is cold the knock is at 0 no matter what. When it warms up it is usually good too. However, sometimes after it is warmed up, while idling it will show 2-4 knock but none under throttle. I can even just blip the throttle and it will go to 0 til the rpms go back down to around 900-1000.
Like i said, im not to concurned becasue im pretty sure that it is way under the damage level but just looking for an explaination as to why it does under idle and not full throttle?

04-27-2006, 12:30 PM	#1
matt87 Leaky Injector Join Date: Aug 2005 Location: Mundelein, IL Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	weird safc knock reading (searched) I have a safc2 hooked up a s13 redtop and lately its been showing weird knock on the safc. Im not really concerned about it becasue i heard its not to trustable and its not high levels of knock. When the car is cold the knock is at 0 no matter what. When it warms up it is usually good too. However, sometimes after it is warmed up, while idling it will show 2-4 knock but none under throttle. I can even just blip the throttle and it will go to 0 til the rpms go back down to around 900-1000. Like i said, im not to concurned becasue im pretty sure that it is way under the damage level but just looking for an explaination as to why it does under idle and not full throttle?