Your engine needs the correct amount of fuel in order to keep the fuel volume and pressure within specifications.
Too little pressure can starve the engine of fuel, causing it to run lean, misfire, hesitate or stall.
Too much fuel pressure can cause the engine to run rough, waste fuel and pollute.
Here are a few ways to do fuel system testing, and how to avoid common mistakes in diagnosing fuel systems.
A malfunctioning fuel system can prevent an engine from starting but so can other problems such as lack of spark, a blocked air intake, or a broken timing belt and simply no fuel in the fuel tank.
Be sure to rule out these possibilities before continuing fuel system testing.
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