Question about 2003 Pontiac Grand Prix
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Posted on Jan 02, 2017
SOURCE: Fuel pressure
With the 3.1 engine: Ignition on 52-59 psi, at idle 42-56 psi. With the 3.8 engine: Ignition on 48-54, at idle 38-51. Let me know if your's is supercharged the specs maybe different.
Posted on Jan 24, 2009
Hello! This indicates a fault with the wheel speed sensor/ABS sensor. Any major auto parts retailer can pull the details of this code (which sensor) for free, which will help you identify if the wiring is loose or damaged or if the sensor will need to be replaced. If you need to replace the sensor - you will need to replace the entire wheel bearing assembly, as the sensor is internal.
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Posted on Nov 02, 2009
GM Century/Lumina/Grand Prix/Intrigue 1997-2000
Fuel Pressure Regulator - Removal & Installing
The fuel pressure regulator is a diaphragm-operated relief valve with fuel pump pressure on one side and regulator spring pressure and intake manifold vacuum on the other side. The regulator's function is to maintain a constant fuel pressure across the injectors at all times. The pressure regulator compensates for engine load by increasing fuel pressure as engine vacuum drops.
The fuel pressure regulator is serviced as a separate component. When servicing the pressure regulator, make sure that the O-ring back-up, large O-ring, filter screen and small O-ring are properly positioned on the pressure regulator.
Fig. Cutaway view of a typical fuel pressure regulator
REMOVAL & INSTALLATION
The need to work as cleanly as possible cannot be over-emphasized. Even the smallest amount of dirt, if allowed into the fuel pressure regulator and/or the fuel rail, will find its way to the fuel injectors. The nozzle openings of the injectors are very small. Keep hands and tools clean. Clean the areas to be disconnected with a suitable solvent. Carefully cover open fittings and connections to keep out foreign material. Dirt in the injectors almost guarantees a clogged fuel injector and engine performance problems.
3.1L and 3.4L (VIN E) Engines
Fig. Exploded view of the fuel pressure regulator mounting-3.1L and 3.4L (VIN E) engines
Other size engine can find in autozone.com (free register).
Hope this help (remember rated this).
Posted on Feb 08, 2010
MOST LIKELY THE FUEL PUMP PRESSURE CHECK VALVE IS DEFECTIVE, THIS ALLOWS THE FUEL TO DRAIN OUT OF THE LINES AND FILTER AND CAUSES A LONG CRANK TIME/HARD START, THE CHECK VALVE IS PART OF THE FUEL PUMP AND THE FUEL PUMP IS LOCATED INSIDE THE FUEL TANK, THE TANK MUST BE DROPPED TO REPLACE THE PUMP.
Posted on Mar 16, 2010
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