Knock Retard??
Knock Retard?? Hello everyone I always hear someone mentioning KR was wondering if someone can explain what KR is? how does it effect the car? what does it do? what causes it?
Thanks
~Tom
Thanks
~Tom
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
It's "knock retard" and refers to the ignition timing advance that the computer pulls when the knock sensors are triggered when detonation (commonly called "pinging") in one or more cylinders takes place. The problem is, these knock sensors are VERY often triggered by things other than detonation. This is referred to as "false knock" or "false KR". Pulling timing advance lower than necessary will cause reduced power.
I'll move this to the tuning section.
I'll move this to the tuning section.
What actually happens during detonation is combustion in the cylinders is occuring before the spark plugs create a spark. This can be caused by lean fuel mixture, bad gas, too much timing, etc.
Originally Posted by Colonel
It's "knock retard" and refers to the ignition timing advance that the computer pulls when the knock sensors are triggered when detonation (commonly called "pinging") in one or more cylinders takes place. The problem is, these knock sensors are VERY often triggered by things other than detonation. This is referred to as "false knock" or "false KR". Pulling timing advance lower than necessary will cause reduced power.
I'll move this to the tuning section.
I'll move this to the tuning section.
Thanks
