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Re: how to put a fuel filter on
All you have to do is remove the gas cap and go under the hood and use a small screwdriver and press the schrader valve. The schrader valve looks like a tire valve on top of the intake on the fuel rail.
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The easiest way to relieve the fuel pressure is to start your engine and pull the Fuel Pump Relay - car should die. Now there is no fuel pressure. Turn the key to the off position and change out the fuel filter. Once the filter is changed, put the relay back in and prime the system - turn the key on (don't start) for a few seconds. Turn off, turn key on for a few seconds then start the car. Check for leaks by filter. Easy peasy. Hope this was helpful :-)
If the cap was left off and then the light came on, I'm sure that you already have, put the cap back on and then have them clear the codes. If it returns then we can move forward with spending money and replacing parts. Let me know.
Disconnect ( or at least loosen) the fuel line as close to the engine fuel delivery system as you can and see if there is fuel pressure. You may have a vapour lock. If you do get pressure how much ? Is it sufficient to supply your requirements. A "new fuel pump" does not always mean a "good fuel pump" - from experience!!! If you do not have fuel at the engine work back to each fuel line connection to were there is fuel pressure if at all. I am not a Nissan expert but the principles are the same for all. You do not say if it is fuel injected or carburated. FI requires higher pressures than carbs. Hope this helps. Let me know how you do in your efforts. Thanks Good luck.
there is a release valve fitting on the fuel rail inside the engine compartment...it looks like a tire valve stem and it may have a cap on it. you need to follow the fuel line up to the fuel rail(s) to find it...when you find it unscrew the cap and depress the little pin inside with a nail or something...be sure to shield yourself as the pressure may be somewhat significant...they use this port to test your fuel pump pressure.
IMPORTANT: Do not skip the fuel system pressure release step. Injury and other damage can result! Safety Step! Relieving Fuel System Pressure
· allow engine to cool · relieve fuel system pressure · put on your eye protection Before you begin the job of replacing your fuel filter, you must
relieve the pressure in your fuel system. A fuel injection system
operates under very high pressure. If you don't release this pressure
before you start unscrewing fuel lines the result can be explosive. Do
this before you attempt to change the fuel filter. To release the
pressure in your fuel lines (and fuel filter) you'll need to locate the
fuel pump fuse in the fuse box. If you don't have a fuel pump fuse,
find the relay that operates the fuel pump. Once you've found the fuel
pump fuse or relay, start the car. With the engine running, pull the
fuse or relay out. If you pulled the right one, the engine will quickly
die. Since it's using all of the pressurized fuel in the system, the
fuel lines won't be pressurized when you crack the fittings on your
fuel filter. Now that you've relieved the fuel pressure you can remove the old fuel filter. If you didn't do this yet, you must go to the previous step and do it. Very dangerous!
Your fuel filter is located under the vehicle, passenger side, below seating area, front of fuel tank, mounted on frame in the fuel line. Make sure you release the pressure on the fuel system before changing the filter. Let me know if you have any further questions and thanks for using FixYa!
I would start by looking for the valve on the fuel rail (or at the filter housing), if you disconnected the fuel pipe from the filter feed you will have a lot of air in the system (and diesels do not like air in the feul system) you will need to have someone crank the motor over while you push in on the schrader valve to release the air out of the system until you get fuel to flow steady out of that port (this may take a short period of time), then you should be able to start the vehicle... would also recommend replacing the fuel filter as well. Hope this helps.