Regan Brown
The Nissan 370Z is a popular car model, but some users have reported issues with the fuel gauge. The fuel gauge seems to empty faster than expected, and the DTE display, which shows the distance that can be travelled before running out of fuel, is not always accurate. Some users have found that they can drive up to 60 miles after the display shows that the tank is empty, but this is risky as it may leave you stranded. To fix the issue, it may be necessary to replace the fuel level sensors inside the fuel tank, which can be pricey.
| Characteristics | Values |
|---|---|
| Fuel gauge problem | Common in 2003 models |
| DTE display accuracy | Inaccurate on 2003 models |
| Fuel gauge fix | Replace both fuel level sensors inside the fuel tank |
| Sensor price | $60 for the secondary sensor, $100 for the main sensor |
| Fuel efficiency | 18 mpg in the city, 28 mpg on the freeway |
| Fuel range | 200-250 miles in the city, 300+ miles on the freeway |
| Fuel light warning | Approximately 50 miles of range left when the light comes on |
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What You'll Learn
The fuel gauge on the Nissan 370Z is inaccurate
The fuel gauge on the Nissan 370Z is known to be inaccurate. This is a common issue with the 2003 model, but it has also been reported in other model years, including 2004, 2009, and 2010. The problem can manifest in various ways, including the fuel gauge dropping quickly, the gauge not reflecting the actual fuel level, and the low fuel warning light coming on prematurely.
In some cases, the fuel gauge may show that the tank is only three-quarters full after refuelling, even though the gas pump has shut off, indicating a full tank. In other instances, the gauge may suddenly drop by a quarter or more after showing minimal fuel drop for a significant distance. The low fuel warning light may also illuminate prematurely, with the gauge showing well above empty, and the car may still have a considerable amount of fuel left when the light comes on.
Several factors can contribute to these issues. One possible cause is faulty fuel level sensors in the fuel tank. The sensors can be expensive to replace, but it is possible to diagnose which sensor is faulty using a consult tool to check the voltage of each sensor. Another potential cause is contaminated resistor elements in the sending units, which can be resolved by cleaning the units or using a fuel system cleaner.
Some owners have also suggested that the problem could be related to the fuel pump harness or the earthing of the harness. Adding an additional earthing strap to the fuel tank has been suggested as a possible solution. Others have found that the issue resolves itself after using fuel from a different gas station, leading to speculation that fuel additives or the use of fuel system cleaners may play a role in improving the accuracy of the fuel gauge.
While there are potential fixes for the inaccurate fuel gauge issue, it is important for Nissan 370Z owners to be cautious and not rely solely on the fuel gauge to determine when to refuel. Keeping track of mileage and filling up at regular intervals can help prevent unexpected empty tanks.
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The fuel level sensor is faulty
The Nissan 350Z and 370Z models have two fuel level sensors inside the fuel tank. A faulty fuel level sensor can cause the fuel gauge to read inaccurately. This can manifest in different ways, such as the gauge dropping quickly, reading about 1-1.5 gallons low, or showing that the tank is almost empty despite being filled.
If you suspect that your fuel level sensor is faulty, you can perform a self-diagnosis to check the fuel gauge reading. Here are the steps:
- Turn the ignition switch on and push the odo/trip button. Note that you can have it on trip A or B, but the information will be erased.
- Turn the ignition switch off.
- While holding down the odo/trip button, turn on the ignition. Check that the trip reads 000.0.
- Push the odo/trip button at least three times within five seconds. All segments of the odo/trip light will light up, and the fuel lamp should come on.
- Push and hold the odo/trip button, and the gauges should read as shown in the service manual.
If the self-diagnosis indicates a faulty fuel level sensor, you will need to replace it. The sensors can be purchased online or from a Nissan dealer, with prices ranging from $60 to $170 per sensor. It is recommended to replace both sensors inside the fuel tank to ensure accurate readings.
Additionally, you can check the voltage of the sensor using a consult tool and compare it to the workshop manual to isolate which sensor is faulty. This issue may also be caused by an earthing problem on the fuel pump harness, so consider fitting an additional earthing strap to the fuel tank as a possible solution.
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The fuel tank might need to be replaced
The Nissan 370Z is equipped with a fuel gauge that displays the amount of fuel remaining in the tank. When the fuel level reaches a certain point, a "low fuel" warning light illuminates on the dashboard, indicating that the tank is nearly empty and needs to be refuelled.
While the fuel light serves as a helpful reminder, it is important to note that the accuracy of the fuel gauge may vary. Some owners of the Nissan 370Z have reported discrepancies between the actual fuel level and the gauge reading. In some cases, the gauge may indicate a higher fuel level than what is present in the tank.
If you consistently experience issues with the fuel gauge accuracy, it may be necessary to consider replacing the fuel tank or related components. One possible cause of inaccurate fuel gauge readings is a faulty fuel level sensor. The fuel level sensors are located inside the fuel tank, and over time, they can wear out or malfunction, leading to incorrect fuel level readings.
To rectify this issue, you may need to replace one or both of the fuel level sensors. It is recommended to consult a qualified mechanic or refer to the vehicle's service manual for specific instructions on accessing and replacing the sensors. Additionally, when replacing the sensors, it is important to ensure that you purchase compatible parts for your vehicle's specific make, model, and year.
In some cases, the fuel tank itself may be at fault for the inaccurate fuel gauge readings. If the fuel tank is damaged, corroded, or leaking, it can affect the fuel level sensors' ability to accurately measure the fuel level. Therefore, if the issue persists even after replacing the fuel level sensors, it may be necessary to replace the fuel tank altogether. This is typically a more involved process and may require additional repairs or modifications.
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The fuel pump may be at fault
Fuel pump failure is a common issue in the Nissan 370Z. If your car is showing that it has run out of fuel, but you are unsure how much fuel is left, the fuel pump may be at fault.
Firstly, check that the fuel pump relay is functioning correctly. If the relay is faulty, the pump may not be receiving power, which could be the reason for the fuel warning light. You can test the fuel pump by removing the factory tube and connecting your own tube to the pump's outlet, which should then be placed in a bucket. If the pump is working, you should see fuel being pumped out.
If the fuel pump is not working, it may be because it is not being adequately lubricated. This can happen if you regularly run your car with less than a quarter of a tank of fuel, or even half a tank. Over time, this can cause the pump to overheat and stop functioning.
If you suspect that your fuel pump is not functioning due to a lack of lubrication, you should first replace the fuel filter, as this is often a cheaper option than replacing the pump itself. If a new filter does not solve the issue, then you should look into replacing the fuel pump.
It is worth noting that some owners of the Nissan 370Z have reported that their fuel gauge is inaccurate, with the gauge showing the tank to be fuller than it actually is. This could be due to an issue with the fuel level sensors, which may need to be replaced.
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The fuel gauge might be broken
The fuel gauge on a Nissan 370Z may be faulty or broken. This is a common issue with the car, and there are several ways to troubleshoot the problem. Firstly, it is important to note that the fuel gauge may not always accurately reflect the actual fuel level in the tank. In some cases, the gauge may stop reading once the fuel level goes below half, displaying a half-full tank even when the tank is not full. This issue can occur due to a faulty fuel level sensor or a stuck float in the fuel system.
One way to diagnose a faulty fuel gauge is to refill the tank when the needle is between half and a quarter full and observe if the needle moves past the top bar of the fuel gauge. If the needle moves up, it indicates that the fuel gauge may be functioning incorrectly. Another possible solution is to replace the fuel level sensors inside the fuel tank, which can be costly. Additionally, some people have suggested moving the floater or reinforcing the fuel hanger if it is broken and hanging by wires.
It is worth noting that the Distance to Empty (DTE) display may also be inaccurate on some models, leading to confusion about the actual fuel level. In some cases, the DTE may indicate a higher number of miles left than is actually the case. This discrepancy could be due to the lines and filler neck taking up space in the tank and skewing the reading.
Given these potential issues with the fuel gauge and DTE display, it is generally recommended to err on the side of caution and refuel when the tank is halfway full to avoid running out of gas unexpectedly. Additionally, keeping a close eye on fuel consumption and mileage can help 370Z owners make more accurate assessments of their fuel levels and plan their refuelling stops accordingly.
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Frequently asked questions
It depends on the year of the car. For the 2003 model, the fuel gauge is inaccurate and the car can be driven for 60 miles after the display shows "---". This suggests that there are two gallons left in the tank.
The fuel gauge in the 370Z is not very accurate. The fuel level sensor starts to act up when the fuel level goes below a quarter of a tank.
The fuel tank capacity of the Nissan 370Z is 20 gallons.
