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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
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#11
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Agreed
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A journey of a thousand+ (epic) miles, begins with a single step, (to the door of an 8). Lau Tzu |
#12
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So I filled up to full tank today. I only managed to put 77.3l in and now I am a bit confused. Stopped straight after to VCDS the fuel level it shows 89l.
x + 4.5 + 77.3 = 89 If the fuel level sensors are to be trusted that means there were roughly 7 litres still in there when the range read zero and VCDS showed 0 litres. Perhaps it is possible? Kind of reassuring, but also annoying, I assume I could have used at least another 3 of those litres without endangering the fuel pump? Thats roughly another 15 miles! |
#13
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I reckon, that on both my S8's there was usually about 2 gallons (9L) left in the tank when range was showing as zero.
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! |
#14
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That sounds about right. I find it so strange that so much fuel is left when range and fuel sensor reads zero. Unless its needed to save the fuel pump, but why so much?
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#15
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Quote:
There is a big margin for sure, and I suspect the tank and filler is marginally more than 90L also |
#16
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I reckon if you brim the tank and have good tank and sender seals in a D2, it has an extra 1 to 1.5 litres in the filling neck too. Probably similar in a D3. I doubt these are calculated in tank capacity....
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Cheers Marty ____________________ Current: 2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest! 2002 Audi S8 - Project Replacement head coming arrived thanks to MJ Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that). Family: 2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car! Sold: 1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl) |
#17
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Good info, thanks guys
Next time it goes to zero I won't worry so much. I wonder how mpg calculations change when we account for all this unused fuel, does that mean our cars actually do better mpg than we think? |
#18
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I think on most petrol cars of this vintage mpg is calculated solely using data from MAF sensor.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#19
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I didn't know that, thanks
Damn that probably means its fairly accurate. |
#20
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......Picking up on this debate, the S8 stuttered and spluttered with 40 miles range left yesterday.
Last time this happened was 11pm Christmas night about 3 miles from home and it stopped completely. At that time I went through the whole fuel pump not seated issue, assumed that at some stage it had been monkeyed with...... but not to be. Turned out the top had popped off the driver side fuel sender tube and the float seemed to stick/jam near the bottom of the tube. Anyway duly fixed and reassembled. Ran around for a couple of weeks with 5lt in a can in the boot to see if it was sorted. Ran the car right to 0 miles range, needle firmly in the R zone without a hiccup. ...fast forward to yesterday, thankfully this time I was about 500yds from a petrol station and nursed it to a pump. Filled to more or less the brim - 88.35lt Spec sheet states 'Tank capacity 90lt' Rough calculation 40 miles range @ 20mpg = 2 gallons/9.09lt left I doubt I'm getting 40 miles on 1.65ish litres of fuel! Looks like I'm going fuel sender purchasing/hunting
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Daily drive: 2016 Infiniti QX70.....a car that's even more complicated than my last Infiniti FX to modify Current 'Project': VW Crafter CR50 4 berth camper van Previous 'Projects': 2006 Subaru Legacy Spec 'B' 3.0R, 1994 Ex-MOD Land Rover Defender, now "civilianised". 2000 Audi S8 FL www.whall.co.uk |
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