How do you tell if your fuel pressure regulator is bad?

Answer 1

To determine if your fuel pressure regulator is bad, check for symptoms such as hard starting, poor fuel economy, or engine misfires. You can also inspect for fuel leaks around the regulator or a strong smell of fuel. Using a fuel pressure gauge, measure the pressure; it should match the manufacturer’s specifications. If the pressure is too high or too low, or if you notice excessive fluctuations, the regulator may be faulty.