7 Symptoms of a Bad or Failing Nissan 350z Fuel Pump Problems

Are you aware that 6 out of 10 Nissan 350Z owners have ever had problems with their fuel pumps? They eventually result in poor performance and cause serious driveability since they prevent the engine from starting.

What are the symptoms of a bad mechanical fuel pump

But the fortunate thing is you can substitute the fuel pump with another one that generates the flow and pressure similar to the original without having to be the same type as the original.

It will instead save you the hustle of searching for the specific one that has had problems. Please read on to discover more.

How can I tell if my fuel pump is faulty:7 Bad Fuel Pump Symptoms & Warning Signs

Any issues with the fuel pump can cause performance problems and major driveability. It is the responsible component for the engine to run by supplying the required fuel. However, you can tell a faulty fuel pump in the following ways:

Where is the fuel filter on a Nissan 350z

Sputtering engine: It indicates issues within the fuel pump; suppose you’re driving at an unswervingly high speed, and the engine sputters suddenly before returning to a typical setup.

Surging car: The fuel pump needs repair if there is irregular resistance inside the fuel pump motor and cause the car to surge

High-temperature stalling: A problem with the fuel pump motor arises from a rising temperature combined with stalling

Starting difficulty: The fuel pump ultimately wears out and weakens from constant running

Insufficient power under stress: The weakened fuel pump fails to keep up with the heightened fuel demands when accelerating, carrying a heavy load, or driving uphill, causing the engine to shut down eventually

Low gas mileage: More fuel than necessary may be pouring into the engine system from a valve within the fuel pump not opening

Whining fuel tank noise: A noticeable howl or whining comes from a faulty fuel pump, while a normal one in regular operation produces a quiet hum

How do you change a fuel pump on a Nissan 350Z?

First, ensure the fuel pump is not functioning on your Nissan 350Z to replace it. Then:

  • Keenly test and remove it through an access panel above the tank in the passenger compartment. 
  • Lower the fuel tank from the car to access the pump after draining the fuel when no access panel exists. 
  • Remove EVAP system hoses, electrical connections to the pump, return hoses, and fuel pump supply in all cases.
  • Install the new pump and attach pick-up screens and any reusable brackets once the pump is out.
  • Re-establish all electrical connections and hoses as you replace a filter if the fuel system uses an in-line external filter.
  • Run the engine to test any leaks after adding fuel to the tank.

350z Fuel Pump Installation


What are common problems with Nissan 350Z?

Some of the common problems associated with Nissan 350Z include a leaking exhaust. You will notice this when you listen to the car when it is idle. It leaks where the exhaust splits before the catalytic convertors. Also, it has clicking driveshafts that you can, fortunately, service by packing up with grease. 

How much is a fuel pump for a Nissan 350Z?

A Nissan 350Z fuel pump is essential to run the car with specific standards and performance expectations. They ensure a measured flow of fuel to the carburetor and engine in addition to a steady fuel flow. An optimal fuel pump in good order starts from $455, depending on your current location.


The Nissan 350Z may have fuel pump problems arising from fuel contaminants like lousy gas, moisture, and gas, wearing out from old age, and electrical faults. They also appear unexpectedly.

Moreover, a fuse or wiring problem or a bad relay that prevents it from receiving voltage may also cause the pump to fail despite the current excellent condition.

A good pump will not deliver normal fuel pressure if the fuel line has a restriction, clogged fuel filter, or a failed fuel pressure. I’m sure you now know how to figure out a fuel pump problem on your Nissan 350Z. Drive safe!

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