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In this guide, you will learn how to replace a Porsche Mass Air Flow (MAF) sensor or clean the sensor.
In this step-by-step guide, you will find instructions on how to check the fuel pressure test on Porsche vehicles.
Let's take a quick look at common signs that you may notice when you have low or no fuel pressure on a Porsche.
To do a fuel pressure test on a Porsche, you will need a fuel pressure gauge.
At idle, fuel pressure should be in the 45 to 55 PSI.
At 2000 or 3000 RPM, the pressure should be around 50-55 PSI.
If your Porsche is struggling to start, you may want to check the pressure after turning off the engine. Keep the gauge connected for at least 15 min after you shut off the engine. The pressure should stay constant. If you are losing fuel pressure too quickly, you may have leaky fuel injectors or a fuel leak. Another issue could be a bad fuel regulator.
If your Porsche starts but then it stalls, the primary fuel pump could still be the problem. On Porsches that have two fuel pumps, the secondary pump primes the system at startup, and the engine starts. A few seconds later, the engine dies. A bad primary pump will cause the engine to stall or run rough after startup.
Just like low fuel pressure, extremely high fuel pressure such as over 100 PSI can be a problem and can cause the engine to run rough.
By YOUCANIC Automotive Experts Published on: Thursday, August 1, 2019. |