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

Engine Will Not Start Cold or Starts Poorly


1. Low or intermittent output from electric fuel pump.
2. Air flow sensor arm or fuel distributor piston not moving freely
3. Defective cold start system
4. System pressure not within specification
5. Differential pressure not within specification
6. Defective fuel pressure regulator
7. Warm up enrichment not within specification
8. Idle switch misadjusted or defective
9. Defective idle stabilization