All posts tagged fuel

Fuel Pump Replacement on Infiniti G35 Coupe

In the end of the previous post, I ended up fixing the fuel leak on the 2005 Infiniti G35 Coupe, by using new bolts and O-rings. Since I had damaged the fuel gauge sensors on both the fuel pump and the secondary fuel gauge sensor, I purchased an after-market replacement fuel pump (Figure 1), made by UltraPower (Figure 2), and secondary fuel sensor (Figure 3), made by Autotecnica, from RockAuto.

Installation follows the same procedure as outlined in the earlier post, but be very careful while installing the pump back in, since you need to avoid damaging the fuel level sensor. Remember to remove both the fuel hoses from the old pump first, as shown in Figure 4, and then attach them to the new pump before install.

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Fuel Leak Fixed on Infiniti G35 Coupe

In the end of the previous post, we ended up with a fuel leak on the 2005 Infiniti G35 Coupe after trying to fix the fuel sensor issue. The car was towed to the dealer, who after keeping it for 10 days and quoting an exorbitant price of over $3000 to fix the fuel leak, did nothing to the car besides fixing a seat belt recall. I ended up losing $200 on the whole and got the car towed back home. Then with help from the forum post and the service manual’s Fuel System section I diagnosed the problem to be loose fuel pump cover bolts and bad O-rings.

Once I purchased the replacement parts from a local Infiniti dealership, I was able to fix the leak. This post describes what I did wrong, and what one should take care of when handling the fuel sensors.

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Fuel Level Sensor Issues on Infiniti G35 Coupe

The 2005 Infiniti G35 Coupe came with a check engine light (CEL) code of P0462 (Figure 1). The fuel gauge always showed empty and I watched a few Youtube videos on how to clean the two fuel level sensors below the rear seats in the car to fix the problem. Apparently, after a while the fuel level sensors tend to collect grime over themselves that leads to the fuel gauge reading a zero value.

This post describes that process to clean it out. However, it turns out that the previous owner did try the same process, as the fuel level sensors were already clean. So this meant that the issue was probably the sensor electrical connection or the dashboard fuel gauge itself. I did the fuel level sensor cleaning/checking on August 3rd, and on August 10th (today) I filled up the tank fully. But it was a disaster. The fuel tank was leaking non-stop (Figures 25 and 26) and so I had to accept my limited abilities at this point and got the car towed to the dealer. The dealer wants me to install a new fuel tank since the current one is dented and has too much rust. 😞

Anyway, this post still describes the fuel level sensor cleaning in case you may benefit from it.

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