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!

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Fuel Delivery Check

Test 1 - 2:




Test 3 - 6:




Test 7 - 9:






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 delivery system operation
- Fuel pump relay fused B+ circuit
- (A141) Fuel pump relay output circuit open
- (Z1) Fuel pump ground circuit open/high resistance
- Fuel pump module