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

Checking the Fuel Delivery System

Test 1:

Tests 2 - 4:

Tests 5 - 8:

Tests 9 - 11:

SYMPTOM
CHECKING FUEL DELIVERY

POSSIBLE CAUSES
- Fuel pump relay
- Fuel pressure out of specs
- Restricted fuel supply line
- Fuel pump inlet strainer plugged
- Fuel pump module
- Fuel pump capacity (volume) out of specs
- Fuel pump relay fused B+ circuit
- Fuel pump relay output circuit open
- Fuel pump ground circuit open/high resistance
- IPM fuse & relay center
- Fuel pump module