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

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Line Pressure

Pressure Gauge Hook-Up:






WARNING: Before performing this procedure, release fuel pressure.


1. Disconnect negative battery terminal.
2. Install pressure gauge.
3. Reconnect battery.

Data Link Connector:







4. Connect data link connector terminals F/P and GND with jumper wire.
5. Turn ignition "ON" and check line pressure.

PRESSURE: 39 - 45 psi (270 - 310 kPa)

6. If not as specified, check:
^ Fuel pump maximum pressure
^ Fuel line clogging and restriction
^ Fuel filter clogging and restriction
^ Pressure regulator hold pressure