Fuel pressure problem?

[jusssi]

Hi. Is it normal that if the engine is running and I stop it, wait couple of minutes and press schrader valve in fuel rail, there's no pressure in rail.? Where is bossibly leak? No external leaks, fuel reg?

 

[BoostedSUV]

Re: Fuel pressure problem?

The fuel pressure should hold for quite some time. How long are you talking after you shut it off?

 

[Don W.]

Re: Fuel pressure problem?

Agreed, it should hold for a few minutes. Reasons an be; bad fuel pressure regulator, a leaking fuel inj. (does it miss for a moment when you restart it?), bad check valve in the fuel pump, a leak in the system somewhere.