2005 Nisson Sentra has trouble starting when warmed up
I have a 2005 Nisson Sentra 1.8 L.
For the longest time it would start fine when it has sat overnight but would start hard when warmed up.
Now it won't start at all.
I have spark
The fuel pump seems to be running
I actually smell gas
It seems like it is flooding.
Could it be the MAF sending to much gas and flooding the engine?
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These vehicles had issues with fuel pressure bleeding down when they sit for a period of time (like overnight). Nissan has issued a Technical Service Bulletin (TSB) on this issue.
There is a check valve in the fuel pump assembly that holds fuel in the fuel line so that fuel is readily available to the engine. This valve fails and allows that fuel to slowly drain back to the tank. The reason you have to crank the engine for a long period of time is that the fuel has to be pumped from the tank all the way to the engine- may take 10 seconds or more.
Once you start the vehicle, fuel is available and since the drain back to the tank is slow, restarting after even a few hours will be much easier.
The repair involves replacing the fuel pump "module" assembly (it's a service kit that contains the check valve mentioned earlier). The fuel pump assembly is removed from the tank and disassembled and reassembled with several new parts. This is a dealer-only repair. Depending on your level of expertise, you may be able to perform the repair yourself, but will have to buy the parts from the dealer.
Nissan Scope Technician- 10+ years experience in Nissan dealership.