How to change 1994 altima fuel pump - 1994 Nissan Altima

check fuel filter,or fuel injectors, fuel pressure regulator.Also check fuel filler cap.Check exhaust system for plugged catalytic converter,muffler,bent exhaust pipes,etc.

its inside the fuel tank ,lift back seat and look for a cover ,under this cover is the sender unit ,on the end of the float/sender unit is the pump

I would do as you say, and check that fuel pump. Might also make sure the air filter is clean.

CHANGE FUEL FILTER.HAVE FUEL PRESSURE CHECK AND HAVE THE IGNITION TIMING CHECK.TIMING COULD BE OFF A LITTLE.HAVE IDLE SPEED CHECK ALSO.

If you mean the fuel pump, It is in the top of the fuel tank. All fuel cars are there now. Since the mid 80's for most.

possibly the fuel pump. fuel running thru the pump is what keeps the pump cool. if it runs out of gas it will get too hot and fry the pump. running one out of fuel causes a lot of pumps to go bad. id start by checking fuel pressure

once you have access to the fuel pump, there is a cover that comes off...usually 4 bolts, then you will have access to the gas tank. Nissan is great for fuel pump replacements, you don't have to drop the tank. anyways, once the access panel is removed you will see the tank, and the wiring that goes to the fuel pump. the pump/sending unit is held in by 8 or 10 small screws. once he cleans the area he will see this easier. these can be a pain so tell him to take his time and get a good grip on the screws so he doesn't strip them. be careful removing/installing, these are fragile items. good luck with this, its real easy and you will be satisfied that you did the work yourself. let me know the outcome.

You might not have to change the pump at all. Get the fuel filter cleaned thoroughly, change it if required(its quite reasonably priced) and since this has MPFI (multi-point fuel injection) engine, either clean it by adding some nozzle clearing fluid or get the nozzles properly cleaned at a authorized service station, where they can connect it to a PC to check the status of the tiny holes of the injector nozzle.............................sodeep

Fig. 1: The fuel pump access cover is located under the rear seat. It is secured by four screws (arrows)



More pics coming....just slow downloading!!!

possible mass air flow sensor is bad.