Join Date: Jan 2006
Thanked 0 Times in 0 Posts
Re: Fuel pressure drops to 0 psi when shut down.
Pressure should stay on fuel rail at least overnight. Mine is still at 20psi on the 3rd day of no use.
The three items that keep fuel pressure are injectors, fuel pressure regulator, and fuel pumps. Other than those items, a leaky line, leaky fuel pressure gauge, or injector seal would need to be present. See that the seal on the new gauge doesn't leak. The 2 gauges that I have had each required removal of the schrader valve first.