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[Webby the Bear]

Hi guys,

2000 Omega 2.5 V6.

Noticed this a little while ago. The fuel gauge seems to be dropping real quick. Example: last night I filled up and had just over half a tank. when I drove to College this morning my fuel gauge was just over half a tank so thats fine. I then noticed that about 2 miles down the road that it had dropped to just below half. I checked the trip computer and I watched the range full very rapidly during this morning's journey: started at 215 and kept dropping. but then it's now seemed to slow down around the 165-170 mark. now my trip involves a dual carriage way trip and in the past as soon as it gets on a motorway or national limit road the range starts to increase. but again it kept falling.

i've had a look uner the car while it was running and there are no visible leaks at all. is it worth popping a spark plug out to see if its soaked with fuel?

any ideas?

cheers

[Lazydocker]

Remember that the trip computer takes an average over the last x miles (15 or so I think) for it's calculations... I can easily take 100 miles off the range in just a few if I come from a sensible cruise to blatting around the twisties

[Webby the Bear]

cheers LD.

Yeah to be honest it wasnt so much that that bothered me. it was the drop over a very short distance on the fuel gauge. i certainly can't see any leaks or smell petrol anywhere.

[TheBoy]

Petrol will evapourate quickly when it leaks.

If your journeys are now shorter, expect to use more, but if its a sudden drop in MPG, and nothing has really changed, I think you need to investigate further.

The MID is not a good test for this, but the gauge should be.


I went out yesterday lunchtime for LPG - it was pretty damn empty, the (petrol) range started at about 420m (yeah, its got the wrong config on the GID, and I can't be bothered to reconfig it ), and by the time I'd filled up (bearing in mind I'd used little petrol, as mostly on gas), it was 220m range...

[Bixy1]

Sounds normal to me . . . 

[Webby the Bear]

Thanks guys,
TB, yeah it's exactly that... we're used to low MPG as we do short trips but this is a ''noticeable'' drop of the range AND on the petrol gauge.

Sorry what is MID and what tests could I conduct to isolate a leak? If it does have a leak and it's in the injection area at least I have a spare fuel rail

[omega3000]

Can you smell petrol inside the car when your driving 

[TheBoy]

MID is the screen above centre airvents

[Webby the Bear]

cheers guys. nope ive already tried to sniff for petrol and nothing. as said ill pull a plug out, check it for being soaked. ill recheck for visible leaks and check the fuel filter too.

anything else i can do? 

[TheBoy]

Be interesting to see if the trims have gone haywire. Passing Brackley soon?

[thebaldeagle]

our mv6 was loosing fuel alarmingly ..turns out the "new" fuel filter we fitted had a leak on the seam...could be worth while checking that?

[omega3000]

Be interesting to see if the trims have gone haywire. Passing Brackley soon?

What does that mean ? 

[Webby the Bear]

cheers guys. Yeah ill definitely be checking the fuel filter. Sorry TB what seems? I'm actually up your way in October for the silver stone BTCC. 29 quid for a day ticket :-) cant wait :-)

[Webby the Bear]

edit. Trims not seems. Sorry lol

[omega3000]