What does the knock sensor do?
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
It tell the PCM when there is a knock, or preignition, and retards the timing. It will not keep the engine from turning over.
CF Veteran
Joined: May 2009
Posts: 1,844
Likes: 4
From: Glen Burnie, MD
Year: 1994
Model: Cherokee
Engine: 4.0 H.O. K&N, Borla headers, custom down pipe, magnaflow hi-flo cat, flowmaster to turn down tip
in mine it does nothing, i took it out and drove around with it....nothing! no difference. i would say it is the crankshaft position sensor, they go out for no reason at all
Thread Starter
Member
Joined: Jan 2010
Posts: 196
Likes: 0
From: Denver
Year: 1993
Model: Cherokee
Engine: I6
Ok, how about this, does the knock sensor go all the way through the block so if it were out there would be basically a big hole in it? If that's the case, could it cause a rough idle because air is escaping the hole?
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