What are the symptoms of a bad fuel pressure regulator?

Written by katina blue
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What are the symptoms of a bad fuel pressure regulator?
A vehicle's fuel pressure regulator has several symptoms when it malfunctions. (Close up detail of a classic car at a car show image by Rob Hill from Fotolia.com)

The fuel pressure regulator, an auto part that controls the pressure and flow of fuel in a vehicle, is an essential part of the fuel system. Several symptoms signify a bad fuel pressure regulator.

Discoloured Spark Plugs

Your vehicle's spark plugs might be sooty-coloured. Remove a spark plug and inspect the tip. If it is blackened, your vehicle's fuel pressure regulator might be bad.

Tail Pipe Smoke

Your vehicle's exhaust should emit only white smoke, but black smoke will issue from the tail pipe if the fuel pressure regulator is not functioning correctly.

Engine Problems

You might have to turn the ignition several times to get the engine to start. The engine might jump or run roughly while idling. Also, it can lose power when you step on the accelerator.

Gasoline Leak

You might see fuel leaking from your vehicle's tail pipe. A bad fuel pressure regulator can cause the leak if it permits fuel to flow into the lines.

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