RJ... Fuel Prob's!!!!

Jontie · 13th April 2007, 08:24

Travelling back from southern climes last night I knew I wouldn't have enough diesel to complete the trip. I'd come from the Wycombe junction of M40 with the cruise control set on 80mph, so I pulled into Knutsford Services with a range of 80 miles showing on the trip com', no low fuel warning light,called in the cafe section and when i came out after about 15mins RJ wouldn't start.

I switched off for a minute or so and tried again, started, but spluttering. I made it into the fuel station and filled it to the brim, £50 quid's worth!!
She fired up OK, revved OK so away we went, just pulled into the first lane and the engine just died!!! Not a nice feeling!!! Pulled onto the hard shoulder and after a few minutes cursing I tried again,started OK and didn't miss a beat for the rest of the trip, been OK since.

It would seem that I now can't trust the comp' to a reading of lower than 100 miles or the low fuel warning light. Has anyone any advice/similar experience?

Incidentally, I've never been impressed with my fuel consumption, I'm averageing about 29mpg normally and on the trip last night 39mpg..which I don't think is good from a 2ltr diesel.

Regards

Zeb · 13th April 2007, 08:32

Sounds like fuel pump or Maf sensor needs attention. Your mpg is rather low...should be in the 40 - 50 mpg bracket unless you spend all day in town or floor it everywhere.

JohnDotCom · 13th April 2007, 09:53

As Zeb says plus below.
The Auto Box will hit your fuel consumption for six. But a combined driving range should give you the higher 30MPG and much better on Motorways of Course.
If you haven't got one fitted Ron's Synergy will also help, not just by increaseing Power but by fewer downchanges therefore Improving MPG.

JohnFol · 13th April 2007, 11:59

I typically get mid 30's, but just had a full service and am up to 37-38 mpg. I'm sure when I first had the car I could easily get mid 40's

I read several times about people getting more than this.

Any pointers?
How do I test the MAF

Keith · 13th April 2007, 13:21

If it is a manual that's is really bad, if it is an auto pass as people seem to report wildly differing results

Pumps should not affect fuel consumption but a dying one in the tank till replaced may effect running and starting when near empty

And no I don't agree with this always keep the tank quarter full stuff except whilst awaiting repairs if you know the pump is shot

If you have one of rons boxes don't rely on the trip comp for mpg figures as it will change on every switch setting, fuel gauge should remain consistent though in as much as you should know over time how far your car will go on a given amount of fuel and the range you have once the orange light comes on

JohnFol · 13th April 2007, 13:40

it's an upsolute, but I would have thought the calculation is done by comsumption / miles driven . . . .

JohnFol · 13th April 2007, 13:41

... and manual ...

Roverron · 13th April 2007, 14:33

Quote:

Originally Posted by Jontie

Travelling back from southern climes last night I knew I wouldn't have enough diesel to complete the trip. I'd come from the Wycombe junction of M40 with the cruise control set on 80mph, so I pulled into Knutsford Services with a range of 80 miles showing on the trip com', no low fuel warning light,called in the cafe section and when i came out after about 15mins RJ wouldn't start.

I switched off for a minute or so and tried again, started, but spluttering. I made it into the fuel station and filled it to the brim, £50 quid's worth!!
She fired up OK, revved OK so away we went, just pulled into the first lane and the engine just died!!! Not a nice feeling!!! Pulled onto the hard shoulder and after a few minutes cursing I tried again,started OK and didn't miss a beat for the rest of the trip, been OK since.

It would seem that I now can't trust the comp' to a reading of lower than 100 miles or the low fuel warning light. Has anyone any advice/similar experience?

Incidentally, I've never been impressed with my fuel consumption, I'm averageing about 29mpg normally and on the trip last night 39mpg..which I don't think is good from a 2ltr diesel.

Regards

I would listen for the in-tank fuel pump (under the right hand rear seat).
Both this and the under bonnet one run for 20-60seconds with the ignition on.
Your symptoms could indicate that it has failed. (usually around 100k miles, but has been known to occur at about 60K)

Keeping the fuel tank above 1/4 full masks the problem.

Ron

apywell · 13th April 2007, 17:12

Quote:

Originally Posted by Jontie

Travelling back from southern climes last night I knew I wouldn't have enough diesel to complete the trip. I'd come from the Wycombe junction of M40 with the cruise control set on 80mph, so I pulled into Knutsford Services with a range of 80 miles showing on the trip com', no low fuel warning light,called in the cafe section and when i came out after about 15mins RJ wouldn't start.

I switched off for a minute or so and tried again, started, but spluttering. I made it into the fuel station and filled it to the brim, £50 quid's worth!!
She fired up OK, revved OK so away we went, just pulled into the first lane and the engine just died!!! Not a nice feeling!!! Pulled onto the hard shoulder and after a few minutes cursing I tried again,started OK and didn't miss a beat for the rest of the trip, been OK since.

It would seem that I now can't trust the comp' to a reading of lower than 100 miles or the low fuel warning light. Has anyone any advice/similar experience?

Incidentally, I've never been impressed with my fuel consumption, I'm averageing about 29mpg normally and on the trip last night 39mpg..which I don't think is good from a 2ltr diesel.

Regards

Hi John

I have the same 75 as yourself. I think my MPG is about the same as yours. I have found that MPG can be different on a return journey back from Hull. I have noticed that if you start the MPG comp while going downhill you will greatly increase your MPG. I can compare my 2ltr 75 Diesel with my old 2ltr Mondeo petrol.. The Mondeo didn't return anything like the 75. Of course if you did 75mph, you would get a better return MPG. Of course I would never be travelling over 70 mph as this would be breaking the law.....

Jontie · 14th April 2007, 08:50

Hi everone,
Thanks to all for the usual helpful replies,
Zeb, I suspect MAF/Fuel pump, but the milage is low. I have to go to the Midlands over this next few weeks so I'll try to get to RR's.

Ron, I'll have a listen then contact you to arrange a visit. Incidentally, there's 39,000 on the clock.

13th April 2007, 08:24	#1
Jontie Loves to post Rover75 2.0L Conn SE Auto Join Date: Nov 2006 Location: Barrowford near NELSON in Lancashire Posts: 456 Thanks: 15 Thanked 3 Times in 3 Posts	RJ... Fuel Prob's!!!! Travelling back from southern climes last night I knew I wouldn't have enough diesel to complete the trip. I'd come from the Wycombe junction of M40 with the cruise control set on 80mph, so I pulled into Knutsford Services with a range of 80 miles showing on the trip com', no low fuel warning light,called in the cafe section and when i came out after about 15mins RJ wouldn't start. I switched off for a minute or so and tried again, started, but spluttering. I made it into the fuel station and filled it to the brim, £50 quid's worth!! She fired up OK, revved OK so away we went, just pulled into the first lane and the engine just died!!! Not a nice feeling!!! Pulled onto the hard shoulder and after a few minutes cursing I tried again,started OK and didn't miss a beat for the rest of the trip, been OK since. It would seem that I now can't trust the comp' to a reading of lower than 100 miles or the low fuel warning light. Has anyone any advice/similar experience? Incidentally, I've never been impressed with my fuel consumption, I'm averageing about 29mpg normally and on the trip last night 39mpg..which I don't think is good from a 2ltr diesel. Regards __________________ [SIGPIC][/SIGPIC]John. (Sadly,they really don't make 'em like this anymore!!!!)

14th April 2007, 08:50	#10
Jontie Loves to post Rover75 2.0L Conn SE Auto Join Date: Nov 2006 Location: Barrowford near NELSON in Lancashire Posts: 456 Thanks: 15 Thanked 3 Times in 3 Posts	Hi everone, Thanks to all for the usual helpful replies, Zeb, I suspect MAF/Fuel pump, but the milage is low. I have to go to the Midlands over this next few weeks so I'll try to get to RR's. Ron, I'll have a listen then contact you to arrange a visit. Incidentally, there's 39,000 on the clock. __________________ [SIGPIC][/SIGPIC]John. (Sadly,they really don't make 'em like this anymore!!!!)

13th April 2007, 08:32	#2
Zeb Banned MGZT V8 & ZTT 190+LPG Join Date: Nov 2006 Posts: 8,089 Thanks: 0 Thanked 0 Times in 0 Posts	Sounds like fuel pump or Maf sensor needs attention. Your mpg is rather low...should be in the 40 - 50 mpg bracket unless you spend all day in town or floor it everywhere.

13th April 2007, 09:53	#3
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	As Zeb says plus below. The Auto Box will hit your fuel consumption for six. But a combined driving range should give you the higher 30MPG and much better on Motorways of Course. If you haven't got one fitted Ron's Synergy will also help, not just by increaseing Power but by fewer downchanges therefore Improving MPG.

13th April 2007, 11:59	#4
JohnFol Gets stuck in 75 Conn SE - XVWY* Join Date: Nov 2006 Location: Reading Posts: 564 Thanks: 0 Thanked 2 Times in 2 Posts	I typically get mid 30's, but just had a full service and am up to 37-38 mpg. I'm sure when I first had the car I could easily get mid 40's I read several times about people getting more than this. Any pointers? How do I test the MAF

13th April 2007, 13:21	#5
Keith This is my second home ZT400 Join Date: Oct 2006 Location: Ellesmere Posts: 5,948 Thanks: 0 Thanked 43 Times in 29 Posts	If it is a manual that's is really bad, if it is an auto pass as people seem to report wildly differing results Pumps should not affect fuel consumption but a dying one in the tank till replaced may effect running and starting when near empty And no I don't agree with this always keep the tank quarter full stuff except whilst awaiting repairs if you know the pump is shot If you have one of rons boxes don't rely on the trip comp for mpg figures as it will change on every switch setting, fuel gauge should remain consistent though in as much as you should know over time how far your car will go on a given amount of fuel and the range you have once the orange light comes on

13th April 2007, 13:40	#6
JohnFol Gets stuck in 75 Conn SE - XVWY* Join Date: Nov 2006 Location: Reading Posts: 564 Thanks: 0 Thanked 2 Times in 2 Posts	it's an upsolute, but I would have thought the calculation is done by comsumption / miles driven . . . .

13th April 2007, 13:41	#7
JohnFol Gets stuck in 75 Conn SE - XVWY* Join Date: Nov 2006 Location: Reading Posts: 564 Thanks: 0 Thanked 2 Times in 2 Posts	... and manual ...