Knock Sensor Question - Please Advise - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Muscle Car Lover · 06-30-2014, 08:41 PM

I did the fuse pull (5 & 20 overnight) and I swear the car was WAY different. After I stopped at work for ~ 9 hours it seemed not the same.

My question is, how does the C5 Camaro knock sensor work? I have seen threads where folks with aftermarket exhaust have it hitting things and that sets it off. The Dual Mode exhaust burps and shakes (awesome!) quite a bit. How sensitive are the sensors? I think I may be getting shifted to low octane table based on crap. What if a rock hits a muffler? Where are the sensors located?

Any help is appreciated.

raptor5244 · 07-02-2014, 08:43 AM

The knock sensors are basically microphones and the ECM and electronics filter and process the "sound" and make a decision based on the background noise level and anything it hears above that level, the louder the knock the more initial timing is pulled.

The ls1 had them under the intake manifold, the ls2 and ls3 have them external on the side of the engine block.

06-30-2014, 08:41 PM	#1
Muscle Car Lover Drives: 2014 2SS M6 "CHRISTINE" Join Date: Mar 2014 Location: Boston Metro North Posts: 2,916 View My Garage	Knock Sensor Question - Please Advise I did the fuse pull (5 & 20 overnight) and I swear the car was WAY different. After I stopped at work for ~ 9 hours it seemed not the same. My question is, how does the C5 Camaro knock sensor work? I have seen threads where folks with aftermarket exhaust have it hitting things and that sets it off. The Dual Mode exhaust burps and shakes (awesome!) quite a bit. How sensitive are the sensors? I think I may be getting shifted to low octane table based on crap. What if a rock hits a muffler? Where are the sensors located? Any help is appreciated. __________________ "But, House Mormont remembers. The North remembers! We know no King but the King of the North whose name is Stark. I don't care if he's a bastard. Ned Stark's blood runs through his veins. He's my king–from this day until his last day." Mods: ARH headers and hi flow cats, VMAX ported throttle body, CAI air intake, Slowhawk Performance tuning

07-02-2014, 08:43 AM	#2
raptor5244 Drives: 2022 CT4-V Blackwing Join Date: Sep 2013 Location: Florida Posts: 2,723	The knock sensors are basically microphones and the ECM and electronics filter and process the "sound" and make a decision based on the background noise level and anything it hears above that level, the louder the knock the more initial timing is pulled. The ls1 had them under the intake manifold, the ls2 and ls3 have them external on the side of the engine block.