h7: Check External Source for Fuel Pressure Problem
| Steps | _Key Off
_Pressurize fuel system per Test Step H1 For EFI: Visually look for fuel leaking at fuel injector O-rings, fuel pressure regulator, and fuel rails For CFI: Remove air inlet tube at the fuel charging assembly. Visually look for fuel leaking at the air horn inlet, fuel injector O-ring, fuel pressure regulator and fuel line to fuel charging assembly. |
| Result | Is there a visible leak? |
| Direction | YES
Remove pressure gauge. Service as necessary. Refer to Shop Manual, Group 24 for service procedure. After servicing leak, rerun Quick Test NO For EFI: GO to Continue For CFI: Remove pressure gauge. Fuel delivery system is OK. Problem is in an area common to all cylinders, i.e. air/vacuum leak, fuel contamination, EGR, etc. |