L/100km or MPG readout is always fluctuating or reading either very high numbers at idle or sometime
09-30-2003, 06:42 PM
#1
AudiWorld Senior Member
Thread Starter
Join Date: Dec 2001
Posts: 628
Likes: 0
Received 0 Likes
on
0 Posts
L/100km or MPG readout is always fluctuating or reading either very high numbers at idle or sometime
zero while I'm driving. Whats up with this thing? Is the readout on the center screen in the gauge cluster reliable or is it all show?
09-30-2003, 06:50 PM
#4
AudiWorld Super User
Join Date: Dec 2001
Posts: 22,571
Likes: 0
Received 0 Likes
on
0 Posts
Normal....it's reading your instantaneous fuel economy. When you are at WOT, you are not getting
great fuel economy. If you idle it will show an insanely great MPG, but off course you can't sustain it. If you average everything out you'll get your average or combined MPG.
There's also two screens, Trip 1 and Trip 2. Trip 1 will automatically reset itself when the car is turned off for an extended period of time and Trip 2 will never reset itself unless you reset it manually.
In both Trip screens there is DTE, MPG AVE, and MPG INSTANT.
There's also two screens, Trip 1 and Trip 2. Trip 1 will automatically reset itself when the car is turned off for an extended period of time and Trip 2 will never reset itself unless you reset it manually.
In both Trip screens there is DTE, MPG AVE, and MPG INSTANT.
09-30-2003, 06:50 PM
#5
AudiWorld Super User
Join Date: May 2003
Posts: 3,647
Likes: 0
Received 0 Likes
on
0 Posts
Yeah....
When you're pulling away from a light, the engine is running much more inefficiently than while crusing at 110kph. I never use the instantaneous MPG...it is useless as far as I'm concerned (sorta like the BMW's dedicated gauge).
And when stopped, it should go to 0 because you are not moving, so you are going zero miles per gallon used...
I don't know how they'd express that in L/100km.
BTW, how can I switch from metric to US measurements?
And when stopped, it should go to 0 because you are not moving, so you are going zero miles per gallon used...
I don't know how they'd express that in L/100km.
BTW, how can I switch from metric to US measurements?
09-30-2003, 06:53 PM
#7
AudiWorld Super User
Join Date: May 2003
Posts: 3,647
Likes: 0
Received 0 Likes
on
0 Posts
For Trip 2, how long a period does the information reflect?
I.e., my avg mpg display is 21mpg. Is this since I've bought the car? (I have never reset it.)
Doesn't it evenutally run out of memory or computational power (i.e, with 100,000 miles, that's a lot of data for the car's trip computer to store).
Doesn't it evenutally run out of memory or computational power (i.e, with 100,000 miles, that's a lot of data for the car's trip computer to store).
Trending Topics
09-30-2003, 06:57 PM
#8
AudiWorld Super User
Join Date: Dec 2001
Posts: 22,571
Likes: 0
Received 0 Likes
on
0 Posts
It's probably since you bought the car....I think it can realistically keep a running average for
the life of the vehicle. All it needs to store is how many miles it's driven since the reset and what the current average is in order to calculate a new average. So, I don't see how it can run out of memory since it's only (probably) storing a couple of bytes of information.
10-01-2003, 05:45 AM
#10
New Member
Join Date: Jul 2003
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Re: Yeah....
Actually when you are stopped, it should in theory go to a stupidly high number (e.g. infinity) since you are burning gas, but not moving
dGas/dDistance (approaches infinity/undefined as dDistance approaches zero).
I can't stand that dial - but it does tell you what being a leadfoot is doing to your mileage.
dGas/dDistance (approaches infinity/undefined as dDistance approaches zero).
I can't stand that dial - but it does tell you what being a leadfoot is doing to your mileage.