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
Component Tests and General Diagnostics
1.
Run engine at normal operating temperature and set throttle on high cam on 4-140 engine or on kickdown step on other engines.
2.
Connect vacuum gauge to
EGR side of load control valve and note reading.
3.
Apply a vacuum of at least 6 inches Hg to venturi port of valve. If gauge does not drop to zero, replace valve.