Please tell me this is wrong and there's a fix

[c70geoff]

Plain and simple
1999 2.4 lpt c70 me7 auto

£30 in tank
Regular driving 64.2 mile return from it
That can't be right

[JamesT5]

That's about 12 - 15mpg judging by my own consumption of about £12 - £15 a day return to get to work and I do around 25 mpg for that.

[merc85]

£1.40 per ltr unleaded super £28 would get 20 ltrs, which is 4.44 gallons, so if your doing 20 mpg that will get you aprox 85 miles, id say summit is wrong

[p fandango]

12.2mpg, thats not right. My 328 got 135miles to £30 (25.7mpg)

[c70geoff]

Knew it was crap but what things can I play with to try sort fellas

[merc85]

I'd say you have a leak,

Check, Injector seals, Fuel pressure regulator under the rail, Fuel filter under car they can rust through, Fuel tank pipes, filler neck (metal clamp) can rot through. Vac leak on the manifold Purge valve from charcoal cansiter, canister itself. fuel return hose/vacum to tank. condition of the plugs. Stupid question is the auto box getting into top gear?

[JamesT5]

Knew it was crap but what things can I play with to try sort fellas

Injector refurb, perhaps you have a MAF fault or another sensor so the engine is over fuelling. A session on Vida might be useful!

[foammanmark]

My manual C70 me7 T5 gives me upto 35mpg, and never less than 28-30 even when driven sportingly. Can't see the auto making such a big difference.

[p fandango]

Knew it was crap but what things can I play with to try sort fellas
even tho it might not be throwing a cel light, read the codes. Also might be worth looking at changing the fuel filter

[c70geoff]

I'm not loosing fuel as in leak but seem to be burning or over fuelling
New maf on there no codes when read yesterday as for top gear not sure as I don't have time to get that far from home but doesn't like changing up or down when struggling sometimes

[merc85]

is the temp gauge reading correclty? 3 oclock position could also be a o2 sensor,

[c70geoff]

Temp gauge is mostly slightly under 3 oclock

[siamblue]

O2 sensor mate,get the number and i will see if i have one here,my auto AWD used to get 16 around town,but even if yours was a cabriolet which are heavy,then that is still using too much fuel..

[M-R-P]

Geoff, are you running blues still?

[c70geoff]

No mate put the orange back in to try get better mpg lol

[V70 Graham]

O2 sensors do play havock with economy but if it's that low is say a leak somewhere.

[partsforvolvos.com]

i would change the thermostat and sensor in the housing.
if the gauge is low, that sensor does the guage and ecu so it could effect fuelling.

[jamesy12345]

Try a piece of cardboard down the front of the radiator, cheaper than a thermostat :)

[JamesT5]

Try a piece of cardboard down the front of the radiator, cheaper than a thermostat :)

:hihi: Sorry, I had to laugh.

[jamesy12345]

:hihi: Sorry, I had to laugh.

well it was meant in jest. I did the same for years with my 440 in Norway. It does help with warm up so will improve the mpg until the 'stat is replaced if that is the problem :)

[c70geoff]

Lol thermostat and housing changed a few months ago

[jamesy12345]

Lol thermostat and housing changed a few months ago

As said above could be the 02 sensor. My Volvo 460 auto had a cheapo one and was doing well under 20 mpg

[partsforvolvos.com]

Try a piece of cardboard down the front of the radiator, cheaper than a thermostat :)

somebody has been watching ice road truckers ....... lol

[960kg]

My 960 only returned 10mpg when an O2 sensor went wrong and i had the error code up also with black smoke out the back!

Owners do not realise that just because an error code does not come up that all is well.......O2 sensors do wear and become not very good at there job resulting in poor mpg......the manufacturers of them state a mileage of between 60 to 100,00...........my 960 went kaput at 103,000.

Get the codes read first!

[T5frankie]

You can easily get 12mpg if you're just pottering around town or your local neighbourhood especially in an auto

[jamesy12345]

You can easily get 12mpg if you're just pottering around town or your local neighbourhood especially in an auto

Maybe in an X5!

[JamesT5]

My 960 only returned 10mpg when an O2 sensor went wrong and i had the error code up also with black smoke out the back!

Owners do not realise that just because an error code does not come up that all is well.......O2 sensors do wear and become not very good at there job resulting in poor mpg......the manufacturers of them state a mileage of between 60 to 100,00...........my 960 went kaput at 103,000.

Get the codes read first!

Might be worth changing mine because my fuel economy is slowly getting worse. Thing is there are two lambda sensors on the P2 and they're around £100+ each!

[jamesy12345]

Might be worth changing mine because my fuel economy is slowly getting worse. Thing is there are two lambda sensors on the P2 and they're around £100+ each!

If they bring the fuel economy up by 5 mpg they would pay for themselves in 4000 miles :) smart arse answer I know sorry but just saying worth doing

[RollingThunder]

Might be worth changing mine because my fuel economy is slowly getting worse. Thing is there are two lambda sensors on the P2 and they're around £100+ each!

IIRC the front one is the one that matters - the second one only checks that the cat is working? I may be wrong but thats my recollection, so if correct you should only need to change the front one.

[jamesy12345]

IIRC the front one is the one that matters - the second one only checks that the cat is working? I may be wrong but thats my recollection, so if correct you should only need to change the front one.

I think you need both tbh, but yes the front one does most of the work

http://www.volvoforums.org.uk/showthread.php?t=8600

[T5frankie]

Maybe in an X5!

That x5 was really economical mate up to 48mpg

[jamesy12345]

That x5 was really economical mate up to 48mpg

I had a Range Rover with the 2.7 TD engine - it was crap struggled to crack 25 mpg

24391

[stribo]

I think you need both tbh, but yes the front one does most of the work

http://www.volvoforums.org.uk/showthread.php?t=8600


As RT said, only the front one will affect the fuel consumption.

[jamesy12345]

As RT said, only the front one will affect the fuel consumption.

I was just trying to say I wouldn't leave a defective rear one in

[c70geoff]

O2 sensor =
Ouch much £243 local stealer

[M-R-P]

O2 sensor =
Ouch much £243 local stealer

Have a word with Jamie at PFV, I think the one he sold Graham was less than 90 quid.

[siamblue]

Have you got a part number yet?

[c70geoff]

Not yet dude haven't been near it today been working on my business planning

[pillapow]

i would change the thermostat and sensor in the housing.
if the gauge is low, that sensor does the guage and ecu so it could effect fuelling.

It will 99% be this, the car isnt getting upto temp so is running cold and rich hence your poor MPG.

Stat and sensor should cure it.

[pillapow]

Lol thermostat and housing changed a few months ago

One of them is faulty, test the resistance!!

[c70geoff]

Front 02 sensor volvo code 8627750
Bosch code 0 258 007 070
Anyone got one hanging around cheap please

[siamblue]

Let me look in my spares bag,i have about 4 but i know some are the same,how many wires are on yours?also is it a LSH25?

text me might be quicker i can get it out to you today.

[siamblue]

Well out of the 7 i have here none are the same as yours,yours is the LS-4.21

[jamesy12345]

Any good?

http://www.ebay.co.uk/itm/2001-VOLVO-S60-V70-2-3-TURBO-T5-LAMBDA-SENSOR-0-258-007-070-/121322687935?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item1c3f654dbf#ht_1833wt_1033

[timbo]

Get a Bosch front one from your local motor factors(rear one not as important), should cost about £100, if you cant fit it yourself get an independent to do it for an hours labour? My front one went and economy was terrible! Don't get a second hand one either! False economy, do it right first time!

[merc85]

Let me look in my spares bag,i have about 4 but i know some are the same,how many wires are on yours?also is it a LSH25?

text me might be quicker i can get it out to you today.


Its a 5 wire sensor peeps

[c70geoff]

Cheers anyways guys much appreciated

[deathrider311271]

http://www.ebay.co.uk/itm/New-Bosch-Lambda-Sensor-Oxygen-Sensor-5-terminal-for-Volvo-0258007070-/331179037789?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4d1bcf145d

correct one brand new