Mpg Meter - Is200

[Athos]

I am an owner of a used Lexus IS200 (auto) and have a question regarding the real-time MPG meter. When the car is idling the needle shows maximum fuel consumption, when cruising or accelerating consumption seems to be ok. Is this normal? My fuel consumption for the past 4 months is 25 mpg.

I will appreciate your comments

Thanks Athos - Cyprus

[Kremmen]

There is a certain speed under which it goes to max.

= perfectly normal

[1972pixie]

I have the same car and when iding mine shows 0 MPG, but I agree that the average is about 25, best I have had on a run is 35 and thats not hanging about so it's not to bad.

[Diapason]

When you're idling, you really *are* doing 0 mpg. After all, you could use up your entire tank of petrol if you were so inclined, and you wouldn't have gone anywhere...

Si

[swfcdan]

i get about 25 too, i dont like the real time moniter, its jus indicated how quickly im using up petrol, its never as high as i want it

[Athos]

Thanks for your quick response.

It seems that there is something wrong with my mpg meter.

From what I have read the meter actually gets its reading from a pressure sensor on the air intake manifold. So probably the sensor is dirty or damaged.

Does any one know where this sensor is located and how do I clean it.

Thanks again.

[MacRS200]

Thanks for your quick response.

It seems that there is something wrong with my mpg meter.

From what I have read the meter actually gets its reading from a pressure sensor on the air intake manifold. So probably the sensor is dirty or damaged.

Does any one know where this sensor is located and how do I clean it.

Thanks again.

It sounds like it is working Ok to me as said above :D

[swfcdan]

if it reads 0mpg when your not movig then thats right, you not moving so you literally are doing 0 miles, per gallon on fuel burnt

[1972pixie]

When you're idling, you really *are* doing 0 mpg. After all, you could use up your entire tank of petrol if you were so inclined, and you wouldn't have gone anywhere...

Si

Correct, gladly mine say's zero

[Athos]

Just to make it clear the needle of my mpg meter points at the top of the gauge (maximum reading) when idling, the same happens when going downhill with my foot off the petal.

Sorry to ask again, is this normal?

[Diapason]

If it's pointing at 80 (so pointing almost directly down) when idling, that's not normal.

Si

[rhosneigr]

As you take your foot off the accelerator to slow down the needle swings towards ehe maximum foel consumpsion figure. When the car comes to a halt and with the engine idling the needle should then return to the zero reading.

[GWilso]

When Stopped

0 Normal

80 Not Normal

[Adie]

If it's pointing at 80 (so pointing almost directly down) when idling, that's not normal.

Si

Thats exactly how mine is most of the time. Even when driving. 80+ mpg

[Athos]

Now that I am sure that my mpg meter is not working properly I am going back to my earlier post concerning the Air Pressure Sensor. From what I have read on the forum the mpg meter actually gets its readings from this sensor located somewhere on the air intake manifold. I want to have a look at it since it might be is dirty or damaged.

Does any one know where this sensor is located and how do I clean it.

Thanks.