Been looking for a while but seems to be alot of options some seeming to work on some engines better than others.
i know you can see it on consult with a Sr but people seem to think thatit can be off quite a bit.
Then you have the people that make there own from the diy guides on the net. Very mixed reviews.
Then you have the likes of te haltech knockears, ks4 ect again have mixed reviews
So what is the best way to heard knock?