knock sensor question
Thread Starter
Member
Joined: Aug 2009
Posts: 156
Likes: 0
From: newport news va.
Car: 92 firebird gta
Engine: L98 with minor mods.
Transmission: 700r4
Axle/Gears: 3.23
knock sensor question
Will the knock sensor detect a knock from say a main bearing or rod bearing or will it only detect detonation from pre ignition ? Just curious.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I've heard it can pick up other noises, but I can't say from first-hand experience that it will.
Member
Joined: Jan 2010
Posts: 138
Likes: 0
From: Dardanelle, AR
Car: 1985 El Camino SS, 2004 Trailblazer
Engine: Hybrid 305, 91 SD TPI, lots of mods
Transmission: 200-4R
Axle/Gears: 3.42
Re: knock sensor question
YES! One way to test that theory is to take a small hammer and tap on the block or oil pan rail near the sensor. DO NOT HIT THE SENSOR. The timing will retard and the engine will slow down slightly! The knock sensor is a microphone that "listens" for the telltale sounds created by detonation (spark knock). The knock sensor will also pick up noisy gear drives, loose pistons, wrist pins, rod knocks, etc. That is why almost all gear drives have the disclaimer "not for use on computer controlled vehicles with knock sensors"!
Thread
Thread Starter
Forum
Replies
Last Post
