2005 Altima Does Not Start

[2001I30MAX]

I have 2005 Altima 3.5SL and engine stalled on a highway after SES flashing. The car was towed to home and the towing driver found out that there was no fuel pressure at the engine and he thought the fuel pump was the culprit. I also checked the code which were P0300 and P0301.
After doing some research, I changed the fuel pump assembly since it was easy enough to do. After the replacement of the pump, the car still does not start. I checked all fuses and relays, FYI.
Did anyone have any experience/symptoms such as this? I want to try different things before I take it to a dealer.

Thanks.

[2001I30MAX]

Does anyone know the cause of the following situation?

For the same vehicle, 2005 Altima 3.5SE, when I turn the ignition key to 'ON' position, I get ONE spark on ignition coil. As I turn the key to START position, It continues cranking but no start. Since car does not start, I checked fuel and spark and that's how I discovered it. Every time when I turn the key on, whether to start or just to turn on, I get one spark. that's it.

Any idea what's causing this and/or what to look to find the cause?

[telcoman]

I want to try different things before I take it to a dealer.

Thanks.

You may end up just complicating the diagnosis and increasing the time it takes for the dealer to figure it out.

Just take it to the dealer before you just start replacing parts

Might be the ECM and or IPDM modules?

http://www.nicoclub.com/FSM/Altima/2005%20Altima/EC.pdf

Telcoman