Attach fuel gauge, briefly turn on key then turn it off. Check for fuel leaks.
No leaks.
Measure the fuel pressure with the key on, engine off.
284 kpa
Measure the fuel pressure engine edling. Watch the pressure for a couple minutes.
260kpa
When idling, use special tool to clamp the fuel return line.
500kpa
When idling, disconnect and plug the vacuum line to fuel pressure regulator.
300kpa
Turn off engine and watch the fuel pressure for 5 mins. Record residual.
250kpa
Read fuel volume. Record volume pumped in 15 seconds. Normal results around half a litre.
2.2 litres in 15 seconds
Its important to know the vehicles fuel pressure/flow so that you know whether the car is running at its optimum condition. Otherwise a faulty fuel pressure regulator maybe sending incorrect data to the ECU, and in turn several faults may incur in your vehicle. i.e: engine constantly running rich, or combustion chamber being flooded with gas. Emissions would be extremely high.
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