Nissan Xterra 2004 SC Stalls - Fuel pump current

Hello All,

I have a 2004 Xterra. I did a current test on the Fuel pump and read 3.5A and 6.5K RPM at idle.

Is this something in range or?

I've seen people comment that this is about 5A and 5.5K at idle.

Please suggest.

When I scope fuel pumps I usually use 1 amp per 10 psi of fuel pressure. So I’d check power and ground at pump and call it. The amperage doesn’t seem low.

The pump is in the fuel tank attached to another connector(again within the tank). This connector is fed by an external connector which is beneath the rear passenger seat. I can't do voltage drop tests until I get the pump out. The vehicle stalls intermittently so trying to see.

www.scannerdanner.com/forum/diagnostic-t...current-and-rpm.html

This is for a maxima fuel pump and pressure to be maintained is same www.2carpros.com/questions/nissan-maxima...maxima-fuel-pressure

Before you go for the pump, are you sure that you're losing fuel pressure when the stall occurs?

With that engine, I'd be more suspicious of an ignition problem. Coils, caps, rotors and distributors are all suspect for various reasons.

Thanks. No I am not.
As it's an intermittent issue, I can't say what goes bad - spark or fuel. Plus I have a P0181. The fuel sending unit houses the connector(in the tank) to the fuel pump plus also has the temp sensor(P0181) and fuel level sensor.(Pic added)

Chicken or egg problem here.
#1- If the pump is failing to deliver enough fuel and the engine stalls, the camshaft signal will not be produced and so the ECM will not activate the relay(+ there will be no spark) and the pump will stop. So here the Cam shaft signal goes Zero first(or the relay signal from ECM) and then the fuel pump current follows it to zero.

#2 - Other way is the pump current goes zero first(loose connection - simply disconnects) stalling the engine and then cam signal will go zero taking down .
spark(controlled by Cam signal).

How does one determine