Hi were is the fuel pump pump located in Nissan Serena highway star

SOLUTION.
I Had Nissan Serena C24 of 2000 with similar Problem of Loosing power after Long drive in Highway or climbing hills or during Hot Days..
The Catch is The Transmission Fluid gets high temperature and the pulley bands or chain of CVT Transmission fails to shift hence Car stalls.
Solution is to use The large Transmission Cooler to assist the Cooling.
Me I bought two Mitsubish pajero Oil coolers, went to mechanics fixed them in transmission cooling system in front and Add about 1L of Transmission Fluid And the Problem ended.
All the best

Nissan pumps are accessible from under the back seat . You may have to remove the back rest part. Couple of bolts and it's out. You'll see the cover to remove to get to the fuel sending unit.

You just go to the link I attached I'm sure you will get the solution of your problem
1991 2002 Nissan Serena Model 1057 23 Series Workshop Repair Service...

Owners manual should tell you, but most use "power steering fluid", sold with that label.

clean the battery cables or tighten them.

Things to check
Plugs;
Remove the spark plugs and read them, they should all have a dry tip and be clean from any carbon, oil or fuel.
Usually if burning fuel properly they will have a brown or whitish looking tint from burned carbon.

If any of the plugs look wet or black or dirty looking different from the others the problem is with that cylinder, change all the plugs and see if that helps, the next lease expensive thing is replacing the plug wires.If your fouling plugs ask your parts store for 1 number hotter plug ( heat range)

Plug Wires;
Open the hood at night with the engine running and see if you find any blue looking arcing around or in the wires, if so replace the wires.

Fuel Injectors
If all above looks good your fuel injectors might be dirty or one might not be working. You could try an injector cleaner mixed in with your gas

A rough idle comes from one or more cylinders not firing as hard as the others or not at all, there are so many causes for this so you have to troubleshoot with the lease expensive fix first.

Another thing is water in the gas, you can pour plain ole rubbing alcohol in your gas tank if you suspect water in your gas. alcohol mixes with the water and makes it burn instead of mis firing.

Valves
One more thing that can cause rough idle is your valves, this requires a compression check on each cylinder. If one cylinder has less compression than the rest remove the compression tester and squirt some engine oil in the cylinder then re test, if the compression increases it is bad rings or a bad cylinder bore, if not it is a valve problem.

Oil seals around the piston increasing the compression temporarily while testing but makes no difference in testing if the valves are leaking.

Good Luck,... troubleshooting and patience, or a good mechanic is the solution if you are working with neither

change the fuel pump.

someone needs to look at this it wont be a problem that could be solved in this way, fuel can be a tricky thing worse on a deisel

most likeliy is the ignation module located at the side of the distributor.
chekc the spark from the high voltage plug first, if no spark then you need to replace the IM.




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