Red_Nic Posted January 17, 2014 Share Posted January 17, 2014 From reading posts on here, the petrol tank size is either 80L or 76L. Who knows which it is for a UK 2004 350Z ? I've always filled my car up from almost empty (petrol light just comes on) at a cost of £85-95 (at £1.30 per Litre equates to 65-73L). But for the last 3 months I cant get more than £60 worth in (46 litres ish). Its still on empty with petrol light on. I wait 1 minute and try to get more fuel in, but its absolutely full. What could be causing this? an air lock in the petrol tank?? or an error with the petrol light sensor coming on too early, saying its empty when its really not? I don't risk driving it long after petrol light comes on coz I don't want to run out! Quote Link to comment Share on other sites More sharing options...
maddog1982 Posted January 17, 2014 Share Posted January 17, 2014 Gauge is inaccurate, what does the DTE read? I ran mine for a few miles when the DTE showed - - - - and only got 71 litres in. I can only get 60 litres in or so if the DTE is showing 40 - 50 miles left. Quote Link to comment Share on other sites More sharing options...
peteman35 Posted January 17, 2014 Share Posted January 17, 2014 (edited) UK zed has a 80L tank. Its most likely the fuel sender unit, when i first got mine it never went above 3/4 tank even though it was full. I ended up doing this with mine. Worked 100% ever since http://www.350z-uk.c...fuel-gauge-pdf/ Edited January 17, 2014 by peteman35 Quote Link to comment Share on other sites More sharing options...
maddog1982 Posted January 17, 2014 Share Posted January 17, 2014 Just read your post again could possibly one of the two sensors in the tank, its quite common to fail. Quote Link to comment Share on other sites More sharing options...
HARMLU Posted January 17, 2014 Share Posted January 17, 2014 Gauge is not overly accurate anyway. But with the colder weather you will find that fuel is colder, which means of a higher density, which means you can't get as much in litre wise. Putting it relatively simply anyway Quote Link to comment Share on other sites More sharing options...
HARMLU Posted January 17, 2014 Share Posted January 17, 2014 To reiterate, with the innacuracy of the gauge along with the density change, I wouldn't worry too much if your car is running ok Quote Link to comment Share on other sites More sharing options...
GMballistic Posted January 17, 2014 Share Posted January 17, 2014 As others have said could be down to just the fuel sender. Some people have cleaned their's and it solves the fault but others have had to replace them. Mine never goes all the way up to full and always reads just under. As long as you know it's not a big deal really I don't think. Worth noting (but you probably already know this) only run your Zed on Super Unleaded as the lower octane normal unleaded is not good for the engine especially when used for any great length of time. Quote Link to comment Share on other sites More sharing options...
HARMLU Posted January 17, 2014 Share Posted January 17, 2014 Having said that, you would only expect a maximum of 5% difference anyway so could well be the sender back pedalled a bit after reading it properly, whoops! Quote Link to comment Share on other sites More sharing options...
R35LEE Posted January 17, 2014 Share Posted January 17, 2014 I have mint low mileage senders if you need them Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted January 17, 2014 Share Posted January 17, 2014 As has been suggested, it'll almost definitely be dirty or worn sender units. Mine has been doing the same recently, just haven't got round to cleaning them yet. Quote Link to comment Share on other sites More sharing options...
RafsZed Posted January 17, 2014 Share Posted January 17, 2014 If your paying £1.30 per litre does that mean your putting regular unleaded fuel into the car, you should be using premium unleaded such as Shell V Power. Quote Link to comment Share on other sites More sharing options...
HARMLU Posted January 17, 2014 Share Posted January 17, 2014 +1 on the super unleaded Quote Link to comment Share on other sites More sharing options...
14N Posted January 17, 2014 Share Posted January 17, 2014 Reading Nic's intro post, she's had the car 8 and a half years and its done 96k. If its survived that long on 95RON then fair play! 1 Quote Link to comment Share on other sites More sharing options...
Ridz Posted January 17, 2014 Share Posted January 17, 2014 Best to fill the Zed with premium fuel when the gauge reads quarter full, if you can. Quote Link to comment Share on other sites More sharing options...
Red_Nic Posted January 19, 2014 Author Share Posted January 19, 2014 Reading Nic's intro post, she's had the car 8 and a half years and its done 96k. If its survived that long on 95RON then fair play! I used super unleaded in it for the first 6 years, but for the last 2.5 years I've used standard unleaded. I can't notice any difference...... I don't drive it hard so I don't notice any difference in performance. What should I look out for by using standard unleaded? Is there anything I should clean out or replace more often as I use standard fuel? Quote Link to comment Share on other sites More sharing options...
Red_Nic Posted January 19, 2014 Author Share Posted January 19, 2014 Gauge is inaccurate, what does the DTE read? I ran mine for a few miles when the DTE showed - - - - and only got 71 litres in. I can only get 60 litres in or so if the DTE is showing 40 - 50 miles left. When the petrol light comes on, the DTE shows that I have 60 miles left. So I'm pretty sure there is way more petrol in the tank when my car says its empty. But I don't like to risk it as I'm not sure which part is most accurate. I think it's prob the fuel sender like people have said. And yes it's no huge problem. I just fill up more regularly . But I'd like my car to give me the correct info, so I'll look to clean/replace the sender. Thanks Quote Link to comment Share on other sites More sharing options...
Level 7 Boss Posted January 19, 2014 Share Posted January 19, 2014 Reading Nic's intro post, she's had the car 8 and a half years and its done 96k. If its survived that long on 95RON then fair play! I used super unleaded in it for the first 6 years, but for the last 2.5 years I've used standard unleaded. I can't notice any difference...... I don't drive it hard so I don't notice any difference in performance. What should I look out for by using standard unleaded? Is there anything I should clean out or replace more often as I use standard fuel? Get the fan as out, as you're about to get flamed. Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted January 19, 2014 Share Posted January 19, 2014 Reading Nic's intro post, she's had the car 8 and a half years and its done 96k. If its survived that long on 95RON then fair play! I used super unleaded in it for the first 6 years, but for the last 2.5 years I've used standard unleaded. I can't notice any difference...... I don't drive it hard so I don't notice any difference in performance. What should I look out for by using standard unleaded? Is there anything I should clean out or replace more often as I use standard fuel? Get the fan as out, as you're about to get flamed. That's about right. It is 'strongly' recommended to use 98ron +. It says it in the owners manual and on the inside of the fuel flap. It's not for performance reasons, its because it is tuned to run on 98 so not running it on 98+ can, and has been known to, lead to engine damage. If you drive it like a granny, never going over 4k rpm then you'll probably be fine, but it's not recommended. It would be advised to return to Super unleaded. Quote Link to comment Share on other sites More sharing options...
Tigerzed Posted January 19, 2014 Share Posted January 19, 2014 Shell V Power nitro and give it some boot its what it's there for! Quote Link to comment Share on other sites More sharing options...
JetSet Posted January 19, 2014 Share Posted January 19, 2014 I can't notice any difference...... I don't drive it hard so I don't notice any difference in performance. What should I look out for by using standard unleaded? 2 things to consider here, first of all if you keep your revs down to 3,000 (which I find sufficient for day to day driving) then you'll be O.K. Secondly, it's important not to put the engine under heavy load, ie hard acceleration from 30 in 6th gear or straining the engine in a high gear up a steep hill. By using 95 Ron you will be down something like 5% on power and 2-3% on fuel economy. Rather than drive around panicking when I can't get Super I simply put £20 of 95 Ron and then fill up when that's gone. Pete 1 Quote Link to comment Share on other sites More sharing options...
HARMLU Posted January 19, 2014 Share Posted January 19, 2014 I can't notice any difference...... I don't drive it hard so I don't notice any difference in performance. What should I look out for by using standard unleaded? 2 things to consider here, first of all if you keep your revs down to 3,000 (which I find sufficient for day to day driving) then you'll be O.K. Secondly, it's important not to put the engine under heavy load, ie hard acceleration from 30 in 6th gear or straining the engine in a high gear up a steep hill. By using 95 Ron you will be down something like 5% on power and 2-3% on fuel economy. Rather than drive around panicking when I can't get Super I simply put £20 of 95 Ron and then fill up when that's gone. Pete Interesting you should quote fuel economy Pete. The difference in super costs roughly 8p more (depending where you shop). That's approx 6% more cost on normal unleaded. So for 3% true cost of super unleaded, why are you potentially wrecking your engine? Plus I don't believe you bumble around in a zed ALL the time, as that's not what for zed's for I've always stood by the fact you're not financially better off by putting 95 Ron in your tank, even though it might seem that at the pump Also, my light comes on at 90miles DTE (if I remember rightly as I don't normally run it below 1/4 tank) 1 Quote Link to comment Share on other sites More sharing options...
Red_Nic Posted January 20, 2014 Author Share Posted January 20, 2014 yes I guess its not much more money to use super unleaded.... and I don't want to ruin the engine i'll switch back to super unleaded =) Quote Link to comment Share on other sites More sharing options...
brillomaster Posted January 20, 2014 Share Posted January 20, 2014 my fuel gauge is terrible. the other day it was screaming bloody murder at me to put some petrol in, (DTE had been on '----' for 20 miles) but i'd only done 330 miles on the tank, and my mpg reading suggested i should be good for over 400. Sure enough, when i filled up yesterday could only get 58 litres in, so still had 22 in the tank Nowadays i reset the mpg reading at every fill up, and as long as its above 26mpg i know i can do 400 miles, regardless of what the fuel guage and DTE reading may be telling me! Quote Link to comment Share on other sites More sharing options...
PMX Posted January 20, 2014 Share Posted January 20, 2014 Filled up yesterday as light was on & it was indicating 20 miles left. Managed to squeeze in 53 litres I guess I need to get this checked out! Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted January 20, 2014 Share Posted January 20, 2014 yes I guess its not much more money to use super unleaded.... and I don't want to ruin the engine i'll switch back to super unleaded =) Quote Link to comment Share on other sites More sharing options...
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