Hello, I have a question about my vehicle listed above. Car runs oddly, it feels like engine wants to shut off sometimes, sometimes it won’t respond when I step on a gas pedal for a couple of seconds. It feels like engine power is decreased and gas mileage is dropped. I replaced air filter, spark plugs, cleaned MAF sensor, without any change. There is no check engine light on, so I decided to measure fuel pressure. First, I measured with fuel pressure regulator vacuum hose connected to intake manifold. It was 36 psi, which is 2 psi higher than normal (30-34psi). Then, I measured with fuel pressure regulator vacuum hose disconnected, and it was 46psi, normal(41-46psi). So overall fuel pressure is little bit higher than normal. Another thing I noticed is that when I shut off the engine fuel pressure drops rapidly to 5 psi, and I know it is not good. There are no obvious fuel leaks anywhere. So, what can it be? Can fuel pressure regulator be bad?
have the same problem?
Sunday, September 29th, 2019 AT 10:21 AM