Diagnostic Aids
WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- A hard start or long crank time when the engine is cold can be caused by low fuel pump volume.
- The fuel pressure should build quickly when the fuel pump is commanded ON.
- If you must command the fuel pump on several times for the fuel pressure to build, suspect low fuel pump volume.
- For an intermittent condition, see INTERMITTENTS in TROUBLE SHOOTING - 3.1L CENTURY, GRAND PRIX & MALIBU article.