Help finding the fuel filter on a 2004 Xterra 2wd... 5 speed

There are a few potential causes for the engine stalling in your Mazda B2900 diesel when driving or when you let off the gas pedal. Here are a few things you may want to check:

1. Fuel delivery: If the engine is not receiving enough fuel, it may stall. Check the fuel pump, fuel filter, and fuel injectors to make sure they are functioning properly.
2. Air intake: If the air intake system is blocked or not functioning correctly, it can cause the engine to stall. Check the air filter, air intake hoses, and the mass air flow sensor (MAF) to make sure everything is clean and working properly.
3. Electrical issues: Faulty sensors or other electrical issues can cause the engine to stall. Check the battery and alternator to make sure they are charging properly, and check all electrical connections to make sure they are clean and secure.
4. Vacuum leak: If there is a vacuum leak in the engine, it can cause the engine to stall. Check for any cracked or broken vacuum hoses and replace as necessary.

It's best to take your car to a qualified mechanic to diagnose and fix the issue, as they will have the expertise and specialized tools to properly diagnose the problem.

I tried to post 2 hours ago and the site wouldn't let me so this will be in 2-3 parts ok ! (1) please clean out your throttle body with fuel injection cleaner and if your using no name branded fuel stop now this has no detergents in it, and you will find a brown varnish inside the throttle plate ,after doing this also spray around the intake manifold and the egr evap egr sensors and hoses if the rpm's change you found a leak next post in comments

normally cause by air in the fuel pump. Check for fuel leaks on shafts.at filters, Check for proper tank ventilation. have the fuel pump checked for internal governor pressure.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Here is the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.

To correct this problem get a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, spray it into the air intake of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is know clean, if you continue to have the stall out the idle speed control valve may be defective and requires replacement.

Yes it's the fuel-pump but check and change the fuel-filter first.

• Dirty air filter or bird nest in the air intake
• Broken vacuum hose or fitting
• Worn plugs or bad wires (will run rough; exhaust may smell dirty or have raw gas odor).
• Clogged fuel injector or fuel filter; failing fuel pump (will also run poorly at high power demand)
  
• Bad throttle position sensor or dirty throttle body - inspect any idle air bypass channels.
  
• Bad or misadjusted idle air solenoid (I'm not sure if it's used on this model; you'll have to check to see what engine you have.)

These are the first places to look. If the Check Engine light is on, getting a diagnostic readout may save some time in your search for the problem.

try this procedure and let me know if it cures the problem.

Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Wow!!! Now that's a headfull of problems....
This could be a great many things...
Check these before you sell. I have a '93 Aerostar and can't live without it.
1. Check idle speed
2. Fuel filter may be clogged or water in the fuel system.
3. Choke improperly adjusted or sticking.
4. Distributor components damp or damaged.
5. Faulty emissions components.
6. Faulty or incorrectly gapped spark plugs/ Also check wires.
7. Vacuum leak at the carburetor/fuel injection unit or vacuum hoses.
8. On 1986 models, stalling during idle or deceleration may be caused by sludge in the throttlebody. (2.3 litre engine)
9. On 1986 & 1987 models with a 2.3 litre engine,hesitation or stalling during acceleration may be caused by carbon build-up on the intake valves.....I hope this helps!! Adios