Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

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LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Pinpoint Tests

PINPOINT TEST A: SLOW TO FILL

Normal Operation
Under normal operation, fuel should flow at a steady rate through the fuel tank filler pipe into the fuel tank. As fuel enters the fuel tank, air is vented through the filler pipe or the on-board refueling vapor recovery (ORVR) system.

This pinpoint test is intended to diagnose the following:
- Fuel tank filler pipe vent tube, if equipped
- Fuel tank filler pipe
- Evaporative emission (EVAP) system
- Fuel tank filler pipe flapper valve (part of the fuel tank filler pipe assembly)
- Fuel level vent valve, if equipped (part of the fuel tank)


A1-A2:






A3-A5: