Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Knock Sensor: Testing and Inspection
1.
Start engine and hold engine speed to 2000 RPM.
2.
Check timing while tapping on the engine block with a small hammer.
3.
Timing should retard momentarily while tapping.
4.
If timing does not retard, check connections and/or replace
knock sensor.