Effects of no knock sensor?
Thread Starter
Racer
Joined: Nov 2002
Posts: 471
Likes: 0
From: Queens NY
Effects of no knock sensor?
My knock sensor is bashed and i can't get the remains of the old one out to put the new one in yet. I'm trying to track down a steady miss, and a lack of power.
I almost never get a code 43, but is this affecting my car in any way?
I almost never get a code 43, but is this affecting my car in any way?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Effects of no knock sensor? (CarAteMyMoney)
Once after each startup the ECM advances timing at WOT when the coolant temp is above 195deg F till a knock is detected.
If no knock is detected the code 43 is set.
Though I don't know the specifics I suspect the ECM takes precautions to avoid damage due to knock.
If no knock is detected the code 43 is set.
Though I don't know the specifics I suspect the ECM takes precautions to avoid damage due to knock.
Race Director
Joined: Oct 2002
Posts: 13,717
Likes: 5
From: RI
Re: Effects of no knock sensor? (CarAteMyMoney)
This controls predetonation in the cylinder chambers by retarding the timing curve. You must get the old on out somehow and replace it. It is critical for maximum engine performance unless you throw your ECM in the garbage can...... :jester
