Thread: 1st time tuning/upgrading advice

Originally Posted by Garandpa

I'll try to clean it first. Hopefully, it's just gunked up. Apparently, there's a special cleaner for those made by CRC?

Also, does the high KR indicate actual knock, or is it a bad result of a calculation?

CRC does make maf sensor cleaner. I keep a bottle of it on hand because I use the oiled K&N air filter, so after I change the filter and drive for a bit, I hit the maf with the cleaner just to make sure I clean it if I over oiled the filter.

The way these knock sensors work, is that they sense piezoelectric frequencies caused by too much pressure in the combustion chamber. so, kr isn't actually engine knock, when you hear the knock, the damage is done and you will need a new block.