[marazas]

Hi!
I have never seen a warning light for low fuel light up on the dashboard in my car and I could not even find any light bulb for that warning when looking at instrument cluster from behind.
Should there be a warning? In that case where is the light for it? I have seen 944 S2 have it and lower red section on the fuel meter lights up when it is on.

Thanks!

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[flash]

yes - it is to the left of the needle - it should come on when you have 2.1 U.S. gallons left

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[Johannvb]

It is in the same location as the oval dash 944. In my experience the needle needs to be below the red line for the light to come on. I normally chicken out before that and fill the car up.

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[White968]

No body has ever had the low fuel light come on? It cost me $30.00 a month in gas\petro to drive my car, great mileage if you dont get on it and I drive it to pick up wine, grocery and drive a 130mph on the Saw Mill Parkway. What better car could one own?

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[flash]

lol - i think it comes on every time i turn on the key

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[marazas]

Thanks!
I probably have to check the bulb as it does not come up when I turn the key.. I never waited for the needle to drop below the red line [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

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[Johannvb]

The fuel light doesn't come on with the key like the rest of the bulbs, so you will have to run the car on an empty tank to find out of it works.

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[ebarone968]

"yes - it is to the left of the needle - it should come on when you have 2.1 U.S. gallons left "

Thanks Flash, I always wondered how low I can go. I got used to the miles left till empty on my truck gauge. I honestly have not seen the light come on yet either. My gauge never seems to go all the way to the full mark after a refill. Mileage is amazing to me if you don't pounce on it.

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[banditsc]

I've have seen the light come on, so I can confirm it's there.

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[Sears]

I have seen it a couple times on my car, definitely works. And it seems to come on when I have less than 2.1 gallons left...

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[flash]

i'm just going by the owner's manual, which says it comes on at 2.1 U.S. gallons

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[moses]

I always hated that light. It's invisible in direct sunlight and not that noticeable the rest of the time. And I can get absentminded on highway runs. It's automatic to occasionally scan the gauges, but I'll forget to get off at the exit and have to sweat my way to the next one. So I wired in a flasher circuit for it, and connected it to the big red trouble light in the center of the console. Now if I get low on gas It's impossible to miss, I think cars to the side of me can see it flashing.

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[Sears]

Flash, I agree, it should be 2.1. I've never pulled over immediately to fill it up to more accurately test it though. It just seems the times it has come on I've driven another 10-15 miles and when I've filled it up I technically had less than 1 gallon left (0.7 the last time). That was on a tank that averaged 20mpg.

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[flash]

could be - i've never ran the tank out, so i don't know how accurate the 19.55 gallon capacity is, or if they figured that in the winter, or what

also, according to the dept of weights and measures, the pump rate affects the acceptable tolerance on the reading - if the pump pumps less than 1 gallon per minute, the tolerance more than doubles (.3% vs .75%) - maybe that's why costco and arco pumps are so slow? even at the fast rate though, a 20 gallon fill up could be off by nearly .6 gal

the difference between a 60 degree fill up and a 90 degree fill up is another .4 gal
the correction is: .00069 / degree F


so, you could be getting robbed of 1 gallon each fill up

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[94SilverCab]

I don't want to get into a big math arguement with you Flash, but gasoline is stored in tanks underground. Therefore the delta is not 30 degrees, but the incremental difference between gas delivered through the pump on a 60 degree day and a 90 degree day, which is probably negligible.

I am highly skeptical of the 1 Gallon/tank quoted above.

Can't agree on everything [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img]

Jay

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[94SilverCab]

Before you reach for your phone...read this...LOL

http://anothermonkey.blogspot.com/2007/07/...e-standard.html

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[flash]

the expansion rate is a physical constant - you would have to measure the temperature of the fuel IN THE TANK to know what to calculate - remember that the fuel tank is directly above the transaxle, which easily reaches temps well over 200 degrees - the exhaust gets to over 400 - it would take about 3-4 minutes to heat the fuel to 90 degrees from 60, which is about what it takes to fill a tank

so, by the time you are done, you have expanded the fuel

that is exactly why there are breather vents and expansion room in the tank

also, that only represents half of the 1 gallon - the other half is acceptable tolerance of a pump, per the dept of weights and measures

also, this presumes an empty tank

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[94SilverCab]

It's also about economics...not just physics.

http://www.natso.com/Content/NavigationMen...ATCanalysis.pdf

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[flash]

of course

i really don't care about the difference, as it is nothing more than a rounding error in my life anyway, and i was only pointing the issues out in reference to being able to accurately determine the reserve point - expansion and pump error could be responsible for a difference of as much as a gallon, which could lead you to believe you only have 1.1 gallons of reserve, due to what it takes to fill up, when in reality you have the full 2.1

or, it could go the other way too

the upside is that you might actually be getting better fuel economy than you think you are

the fill tube et all holds nearly a gallon too, so if you are "topping off" you aren't getting an accurate reading

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[968Syncro]

I ran out of gas once, the light was on, I pushed it. It seemed to me that the number of miles available once the light comes on is lower than other cars. Sorry I didn't record any quantitative info on this one experience, but just from experience on other cars I figured I had a few more minutes of driving, but didn't. So please be careful if you push it too far, I always fill before the light comes on now, just don't trust it anymore, maybe the warning system is out of calibration on my car.

Cool part: it died in front of my target gas station, the one I was heading to when I knew it was critically close. A couple of guys in another car hopped out and pushed me into the driveway to the pump. Very nice.

Roland

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