Operation CHARM: Car repair manuals for everyone.
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

Surge

Variation in vehicle speed is felt although accelerator pedal is not operated.
1. Variable fuel pressure (clogged fuel filter, defective fuel pressure regulator, etc.)
2. Defective EGR system.
3. Defective injector.
4. Poor performance of Water Temp., Air Temp. or Pressure sensors.
5. Faulty ECM.