Computers and Control Systems: Service Precautions

WARNING: Fuel vapor is hazardous. It can very easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.

Fuel Line Safety Procedures
1. Release the fuel pressure before disconnecting a fuel line.
a. Start the engine.

Fuel Pump Relay Location:

b. Remove the fuel pump relay.
c. After the engine stalls, turn the ignition switch to OFF.
d. Install the fuel pump relay.

2. Avoid leakage.
a. When disconnecting a fuel line hose, wrap a rag around it to protect against fuel leakage.
b. Plug the hose after removal.

Fuel Pressure Gauge Installation:

3. Install hose clamps to secure the fuel pressure gauge to the fuel filter and the main hose.

Crimping Return Line During Testing:

Pinching Hoses
When pinching an air hose or a fuel hose with pliers, wrap the hose with a rag to prevent damage.