The Nissan Altima is a mid-size automobile manufactured by Nissan, and is arguably a continuation of the Nissan Bluebird line, which began in 1957.

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it cranks won't fire or not getting any fuel

2003 nissan atimal it cranks won't fire or not getting any fuel don't hear fuel pump when come on.

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mitchell1 you are not telling us what you have checked regarding the fuel situation. Now here is how it all works according to the SM:"

The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and camshaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump." So what the means is that you need to check your pump, the relay after that the POS and the camshaft position sensor as well as all the wiring in between. Then if still no error found you need to check the ECM.

Without sending you on a wild goose chase I recommend that you check the fuel pump fuse (see image for loaction)

Block Image

Next is the fuel pump relay




Ignition switch: ON (Engine stopped)

Turn the fuel pump relay “ON” and “OFF” using CONSULT-II and listen to operating sound


Fuel pump relay makes the operating sound.


Harness and connectors

Fuel pump relay

The relay is built into IPDM E/R

Block Image

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First, check the battery power for its full potential power. Test, battery. If results from test say battery is:Good, then crank the engine and hold down the gas pedal. If car still does not start, visually inspect the fuses. Focus on the fuel pump areas.

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OK easiest answer is if you don't hear the fuel pump prime. Then suspect bad fuse or pump. Check fuse box either in car or under bonnet (hood). If fuse is good, chance are your pump is bad.

It can only be one of 3 things, fuel, air or spark!

Air isn't the issue, spark probably isn't the issue. If it is a fuel injected car, turn key on as you would to prime it, then turn off. crack the nut on the fuel hose to the fuel rail, start undoing it, if no fuel comes out. Bad pump, if fuel dribbles out but not under pressure as it should be, bad pump. Change out pump. If fuel comes out under pressure, tighten nut. Turn ignition on, as you would to prime pump, then off again.

Wait ten to 15 minutes. Then crack that nut again, should still be pressurised, if not bad pump.

If pressurised, then your pump is prob on the way out or just silent. Check fuel filter, could be clogged, change it out and try to start, if starts. I'd order a new pump anyway. If doesn't start, bad pump.

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mitchell1 will be eternally grateful.
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