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My 2008 350z fuel gauge always reads empty, the rest of the gauges work fine and as far as i can tell fuses and relays are all fine. Ive tried a few different pairs of fuel pump and sensor but no luck. ive also tried cleaning the contact points where the float is to no luck, any help would be amazing.
 

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My 2008 350z fuel gauge always reads empty, the rest of the gauges work fine and as far as i can tell fuses and relays are all fine. Ive tried a few different pairs of fuel pump and sensor but no luck. ive also tried cleaning the contact points where the float is to no luck, any help would be amazing.
On the G35 it's a broken solder joint on the gauge cluster board. Also, you have two sensors in the saddle type tank. May want to clean the driver's side unit, too.
 

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My 2008 350z fuel gauge always reads empty, the rest of the gauges work fine and as far as i can tell fuses and relays are all fine. Ive tried a few different pairs of fuel pump and sensor but no luck. ive also tried cleaning the contact points where the float is to no luck, any help would be amazing.
My son recently gave me his 2004 350z (October 2022) with about 100k miles. It has a few minor problems to take care of. He has previously replaced the floats in both sides of the gas tank (behind the seats) but the gas gauge isn't working again. I was getting ready to replace them (again!) but read somewhere (maybe here?) that using a fuel cleaner solved the problem. The person giving the advice used Super Tech (walmart's brand of auto products) Motor Treatment (about &7.50) to solve the problem. I figured I'd try the same thing before buying expensive parts and doing the labor myself. I had a minimal amount of gas in my tank when I put the product in (at Walmart's parking lot just after buying it). I drove less than a mile to the grocery store and then decided I should have more than a few (maybe 5?) gallons of gas in the tank. I went from the grocery store to a gas station about half a mile away and put in another five gallons of gas. Myu gas ;gauge was already reading something again. After putting another 6 galons of gas in the car my gas gauge read half full! Per the instructions I had read online I drove home, not wanting to immediately fill the tank. A while later I went on another errand. I decided to go ahead and fill the tank. When I did my gas gauge read full. Hallelulah! My non working gas gauge appears to be fixed! (I bought a second bottle of Super Tech Motor Treatment in case the first use didn't totally fix the problem. I'm going to use it too just for good measure.) I suggest you try this fix yourself before changing any parts on your car. For just $7.50 plus tax this product fixed my car. Maybe it will fix yours too! Be sure to post here if it does! This was WAY easier than replacing parts! (Btw, I took a photo of the product to display with this post I but can't seem to attach it.)
 
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