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Hi,
Wife`s 03 XC70 has had a dramatic increase in fuel consumption the past few months.
What could lead to this issue? Fuel filter? Air filter was cleaned the last time the car was in the shop(August) but not replaced.
Thanks,
Rich
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Have you switched to regular gas to save money?
A lot of people think that a knock sensor will take care of that.
IMO they are incorrect -
When a knock is sensed - pre-ignition - changing the timing will NOT help - it is firing before ignition occurs.
The computer adds fuel to cool the offending cylinders
The result is poorer mileage.
--
'96 855R,'64 PV544 driver, '67 P1800 basket case, '95 855, '95 854, the first three are mine, heh, heh, 485,000 miles put on 9 bricks
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No, my wife uses "premium" fuel so that`s not a factor in this issue.
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My wife also has the 2003 XC. Just curious, what did the milage drop from ..... and what is the lower .....MPG???
We live in CT (been a very mild winter), but I find the car range 21.5 (around
town) and about 26.5m/g with with mostly highway driving.
Art
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I haven`t done any actual calculations in the mileage drop but I suspect it`s dropped from approx "25" in highway driving to maybe around "20". My wife commutes 100 miles daily, mostly highway miles. The monthly fuel bill is adding up!
Have you experienced any issues with your `03 XC? We`ve owned the car for 5 yrs this month & my wife loves it tho` the first 18 months the DIM & ABS module went south plus the bevel gear which was covered under warranty. We were concerned that maybe this XC would be nothing but trouble. However, we are long time Volvo owners so hung in there & no regrets.
Rich
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Rich, We have owned my wife's 2003 XC for 7 years. It only has 86K miles on it.
She will not depart from the Volvo line (owned 7, starting with a 1981 240 wagon. I drive a 2004 V70 (136K miles), and the XC is at it's best when the going "gets tough." The XC has been mostly maintained by me with the help of this site.
The only major repairs I can recall are: I had to replace the alarm module (2hrs, $180 for part). Also, last Fall the right rear parking brake sheared from it's mounting plate and tore up the internals in that area. I had both rear braking assemblies renewed (new disc's, parking pads, brake pads, bearing and shaft on damaged side,etc). It cost about $1100......... I was not
happy with the failure, but the problem may have been precipated by a bad batch of bonded parking pads dating back to factory assembly per repair shop seeing several of these faliures in 2003's.
I would definitely recommend checking/replacing the parking brake pads the next time rear disc pads are replaced.
Art
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posted by
someone claiming to be Gustafkalle
on
Sun Mar 18 22:16 CST 2012 [ RELATED]
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Our V70 ยด98 GLT 170HP NA suddenly increased fuel consumption + heavy increase in oil consumption. Was really worried since thes could be signs of dying, but decided to look for the simple first. Car had just before been to shop to have front O2 sensor replaced (threw a code repeatedly, 160 k miles on odo, no fuel consumption increase at that time point).
Turned out intake air preheater aluminum hose had come off from metal casing over exhaust manifold which is easily seen between engine and firewall. 3 weeks after pushing metal tubing back in place everything now seems in order. I assume increase in oil consumption was because electronics was feeding engine with a far to "rich" mix, the extra gas washing out cylinder wall oil (?). Suggest you check if you have some similar issue with intake air.
My guess is mechanic dislodged air intake hose to route cable for replacement O2 sensor, then didnt push air intake hose back on firm enough.
Good luck!
Gustaf
multiple Volvos in premorbid history; now 2xV70, 1x850
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What? They banged the dirt out of the filter and put it back in????? A new filter is $10! And, I assume your access road is dirt, so there would be a fair amount of dirt in the paper filter.
Not your fuel filter. When it cloggs, less gas is supplied.
The XC is due to have its vacuum lines inspected, look for cracks. Don't forget the turbo vacuum lines and the fuel pressure regulator vacuum lines between the block and the firewall.
Last, the front O2 sensor might be reading low and increasing fuel delivery.
Klaus
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There is no present time, just the past and future
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Klaus - I just went to Autozone and bought air filters for my '96 850 and '07 V70. Both (Purolator brand) were about $30 each!!! Where do you buy your air filters?
Thanks,
Bernie
'96 850 (310K miles), '07 V70 (120K miles)
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http://www.fcpgroton.com/product-exec/product_id/4759/nm/Volvo_850_Air_Filter_1993_1997_Mann_/category_id/136
--
There is no present time, just the past and future
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Thanks Klaus! 'Just ordered TWO from FCP Groton - one for my '07 V70 and one for my '96 850. 'Will return the $30 Purolators to Autozone this week ...
Bernie
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Klaus,
Thanks for your input....will check these possibilities out. With premium at almsot $5.25/gallon, can`t afford not to!
Rich
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I usually don't get good gas mileage either, and when driving in sport mode I get about 17.5 MPG. I switched over to economy mode, which isn't as smooth but it gives 23 MPG. This is all city.
I read someplace that by removing the prop shaft, the gas mileage with increase. Someone quoted about 29 MPG in the city. Since the summer is approaching I have considered doing thi,s and then replacing it in the winter. Is this very hard to do, or is it recommended?
--
1959 Volvo Amazon 121, 1998 Volvo V70R AWD
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23 mpg city is nothing to sneeze at, it is really good. 29 mpg city is unheard of, even with FWD. A V70 with an NA engine can get around 30 mpg highway, depending on how full the wagon is and which way the wind is blowing.
Removing the prop shaft is common, and fairly easy to do. If you plan on re-installing it, remember to mark each section so that it can be put back as it was. You do not want an imbalanced prop shaft coming through the floor of the car or destroying the center baring or pinion seal. It is heavy...
If you remove the shaft, beware of a few things. Your car will torque steer. The slip control will no longer function as well. Driving in the rain can be a bit dicey, to say the least. Your mpg will get better.
Klaus
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There is no present time, just the past and future
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