Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test Step 5 - Check Fuel Delivery System Output
The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting, or line, the fuel system pressure must be released. Failure to follow these instructions can result in possible serious or fatal injury.
- Ignition on, engine not running.
- With the scan tool, actuate the fuel pump.
- Open the flow test valve (1) for 20 seconds, then close the valve.
Stop All Actuations.
- Turn the ignition off.
- Measure the amount of fuel in the reservoir assembly (2). The fuel output specification is ml/s X 20 seconds = fuel flow in ml.
| Fuel Flow | ||
|---|---|---|
| ENGINE | ml/s | ml per 20 Seconds |
| 6 Cylinder | 20.8333 | 417 |
Does the amount of fuel in the reservoir meet or exceed the specification?
Yes
- Test complete.
No
- Perform the Fuel Delivery System diagnostic procedure. Refer to FUEL DELIVERY SYSTEM TEST .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.