Instrument Trip niggle

skin77 · 3rd November 2007, 00:11

I don't know if this will be posted in the right place but I'm sure someone will move it PDQ if it isn't

Today I turned on my trip computer to display the tank range and it had gone up amazingly from about 255 to 1000 miles, I have just rechecked it after driving on and off today and it is now down to 502.

Does anyone have any idea why this may happen ? Is it a fluke that may not reappear ?

Only having had the car a week, I'm not worried, but I really don't want it to go back under warranty to be sorted as I'm really enjoying it !

Answers on a postcard !

John

JohnDotCom · 3rd November 2007, 00:26

After you reset Computer, the MPG and the range will be inaccurate for a short time, as it computes from distance travelled in Total at that time.
If you have a Diesel and the Performance Enhancing Boxes such as Rover Ron's Synergy these also give an over optimistic reading.
Just use it as a Guide.
I've often had 700MPG indicated after Reset and coasting down hill as an example,
if only that was true.

skin77 · 3rd November 2007, 00:34

Cheers JDC.

I haven't reset it, I just turned it on ! it was fine up to today !

Its the petrol with the leaden footed pilot model !

David3807 · 3rd November 2007, 07:46

Happens to mine every now and again.

Just pop a little more fuel into the tank and it should cure it.

I find the 'wishful thinking' reading usually happens if I have been a bit quick in turning the ignition key for the start.

skin77 · 3rd November 2007, 08:21

Ok David, cheers I'll try that.
One of my mates suggested that, he's had that problem in a vectra, so I'm wondering if its a sensor thing. Maybe I've been round a corner quickly or something !

David3807 · 3rd November 2007, 08:26

Is there any other way to take a corner in a 190 ??? :lol:

I think its more likely that the electrics on a 75/zt are not that quick and if you do something a bit quick they can get confused.

Thats why the battery off reboot can work on so many occasions.

skin77 · 3rd November 2007, 08:41

I'm a bit loathe to try the battery off approach ( I'm lazy and don't want to reset all the presets on the radio ! )
I'll try the fill it up in about half a tanks time !

JohnDotCom · 3rd November 2007, 16:18

Buy yourself one of the Plug in car Lighter sockets keep memory Gizmos.
Saves re-tuning and remembers the Code number to.

Departed · 4th November 2007, 10:12

Quote:

Originally Posted by JohnDotCom

Buy yourself one of the Plug in car Lighter sockets keep memory Gizmos.
Saves re-tuning and remembers the Code number to.

But surely that defeats the object of the battery disconnect, by keeping everything powered up?

steve00117 · 4th November 2007, 16:04

This happens from time to time on mine, as David said just put some more fuel in and it will be ok.

3rd November 2007, 00:11	#1
skin77 Avid contributor MG ZT-T 190+ Starlight Silver Commission No. 13590 Join Date: Sep 2007 Location: Egham Posts: 133 Thanks: 0 Thanked 0 Times in 0 Posts	Instrument Trip niggle I don't know if this will be posted in the right place but I'm sure someone will move it PDQ if it isn't Today I turned on my trip computer to display the tank range and it had gone up amazingly from about 255 to 1000 miles, I have just rechecked it after driving on and off today and it is now down to 502. Does anyone have any idea why this may happen ? Is it a fluke that may not reappear ? Only having had the car a week, I'm not worried, but I really don't want it to go back under warranty to be sorted as I'm really enjoying it ! Answers on a postcard ! John __________________ .......the wind changed didn't it !

3rd November 2007, 00:34	#3
skin77 Avid contributor MG ZT-T 190+ Starlight Silver Commission No. 13590 Join Date: Sep 2007 Location: Egham Posts: 133 Thanks: 0 Thanked 0 Times in 0 Posts	Cheers JDC. I haven't reset it, I just turned it on ! it was fine up to today ! Its the petrol with the leaden footed pilot model ! __________________ .......the wind changed didn't it !

3rd November 2007, 08:21	#5
skin77 Avid contributor MG ZT-T 190+ Starlight Silver Commission No. 13590 Join Date: Sep 2007 Location: Egham Posts: 133 Thanks: 0 Thanked 0 Times in 0 Posts	Ok David, cheers I'll try that. One of my mates suggested that, he's had that problem in a vectra, so I'm wondering if its a sensor thing. Maybe I've been round a corner quickly or something ! __________________ .......the wind changed didn't it !

3rd November 2007, 08:41	#7
skin77 Avid contributor MG ZT-T 190+ Starlight Silver Commission No. 13590 Join Date: Sep 2007 Location: Egham Posts: 133 Thanks: 0 Thanked 0 Times in 0 Posts	I'm a bit loathe to try the battery off approach ( I'm lazy and don't want to reset all the presets on the radio ! ) I'll try the fill it up in about half a tanks time ! __________________ .......the wind changed didn't it !

3rd November 2007, 00:26	#2
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	After you reset Computer, the MPG and the range will be inaccurate for a short time, as it computes from distance travelled in Total at that time. If you have a Diesel and the Performance Enhancing Boxes such as Rover Ron's Synergy these also give an over optimistic reading. Just use it as a Guide. I've often had 700MPG indicated after Reset and coasting down hill as an example, if only that was true.

3rd November 2007, 07:46	#4
David3807 Posted a thing or two 2002 R75 Conn SE 2.5l Auto Tourer, 2001 R75 Conn SE 2.5 Auto Saloon Join Date: Nov 2006 Location: Gravesend Posts: 1,897 Thanks: 0 Thanked 2 Times in 2 Posts	Happens to mine every now and again. Just pop a little more fuel into the tank and it should cure it. I find the 'wishful thinking' reading usually happens if I have been a bit quick in turning the ignition key for the start.

3rd November 2007, 08:26	#6
David3807 Posted a thing or two 2002 R75 Conn SE 2.5l Auto Tourer, 2001 R75 Conn SE 2.5 Auto Saloon Join Date: Nov 2006 Location: Gravesend Posts: 1,897 Thanks: 0 Thanked 2 Times in 2 Posts	Is there any other way to take a corner in a 190 ??? :lol: I think its more likely that the electrics on a 75/zt are not that quick and if you do something a bit quick they can get confused. Thats why the battery off reboot can work on so many occasions.

3rd November 2007, 16:18	#8
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	Buy yourself one of the Plug in car Lighter sockets keep memory Gizmos. Saves re-tuning and remembers the Code number to.

4th November 2007, 16:04	#10
steve00117 Avid contributor 75 Saloon Con SE 2.0V6 Join Date: Jun 2007 Location: Oop North Posts: 134 Thanks: 0 Thanked 0 Times in 0 Posts	This happens from time to time on mine, as David said just put some more fuel in and it will be ok.