- Today I replaced the fuel pressure regulator. Still no change. I’m still having trouble starting the car. I would have to step on the gas pedal a few times, not all the way though before it’ll start.
How to troubleshoot:
- This requires two people and one if you have remote start. Disconnect the Vacuum line of the Fuel Pressure Regulator AND Fuel Pressure Damper and check for fuel. There should be NO fuel present in the Vacuum lines or Vacuum port of the Fuel Pressure Regulator and Fuel Pressure Damper.
- Total Diagnostic time: 5-10 minutes.
- Difficulty: EASY
- A New O.E. Fuel Pressure Regulator ($70-$120 on EBAY)
- A New O.E. Fuel Pressure Damper ($115-$150 on EBAY)
** Anyone with basic mechanical skills should be able to replace these parts in 2-4 hours. It’s VERY IMPORTANT when dealing anything fuel related on the car to relieve all the fuel pressure out by removing the 15 AMP Fuel Pump fuse in the fuse box under the dash of the driver side, removing the fuel cap, and starting the car until it can’t start anymore. **
Tools needed for this job:
- 10mm socket with ratchet
- Socket extension
- Flathead screwdriver
The Fuel Pressure Regulator and Damper is fairly easy to replace.
- Remove Air Intake.
- For the Fuel Pressure Regulator, remove the two 10mm bolts on it. Use pliers to move the clamp down on fuel hose. Then CAREFULLY use a flathead screwdriver to pry off the the fuel hose and vacuum hose on the Fuel Pressure Regulator.
- For the Fuel Pressure Damper, there are a total of 5 10mm bolts you have to remove. Two on the Damper, one on the bracket in the middle of the damper hose, and two at the end of the damper hose. Use pliers to move the clamp down on fuel hose. Then CAREFULLY use a flathead screwdriver to pry off the the fuel hose and vacuum hose on the Fuel Pressure
**Make sure there is an O-Ring on the Fuel Pressure Regulator and Damper or else Fuel will be everywhere when you attempt to start the car**
I hope this thread is helpful to anyone who is having similar problems on their Maximas. GODSPEED