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Volvo C70 Fuel and Mileage Questions

35 messages,  Last post on Aug 27, 2007 at 12:33 PM

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What is this discussion about? Volvo C70, Coupe, Convertible

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#26 of 35 Re: Engine Light [rogert1] by tom007 May 01, 2007 (1:20 pm)
Replying to: rogert1 (May 01, 2007 10:32 am) What year C70 is it and won't the warranty cover the repairs and give you a loaner car? How many miles are on car?   Hope you get it solved quickly, but seems as if it is a mystery to dealer by your report.Keep us informed as to solution when they find one. Thanks!!   Maybe Volvomax can solve it for you also.
#27 of 35 Re: Engine Light [rogert1] by qbrozen May 02, 2007 (7:07 am)
Replying to: rogert1 (May 01, 2007 10:32 am) well, i don't know what that is saying exactly, but the first thing I do when the word "rich" comes up in relation to fuel is pull the spark plug and take a look. Has anyone done that during your trips to the dealer?
#28 of 35 engine light by rogert1 May 02, 2007 (7:50 am)
Thanks for the replies. My c70 is a 2000 model.And the spark plugs have been checked and are fine. They were new at the recent service. Since the engine light was put out (re set) the car doesn,t start so well ,which may be a clue to someone. Ive also had it suggested that a temperature sender may be at fault.  The light hasn,t come back on yet (2 days) Replies to this message: qbrozen (May 02, 2007 8:48 am)
#29 of 35 Re: engine light [rogert1] by qbrozen May 02, 2007 (8:48 am)
Replying to: rogert1 (May 02, 2007 7:50 am) how long after the recent service did the light come on?   where did you have it serviced?   the reason I ask is because my volvo (and i hear most are) was VERY sensitive to the type of plugs. Anything other than OEM gave me problems, no matter how high-quality they supposedly were.
#30 of 35 How long after my service did the light come on ? by rogert1 May 02, 2007 (1:22 pm)
As I think I said earlier it was between 1 and 2 weeks when the engine light came on first. The thing I don,t really understand is if it was a fault with the plugs,why doesn,t the light come on immediatly? and not at what seems to be a random time.One day I drove over 60 miles and the light stayed off. The garage which serviced my car was just a small concern where my brother in law works.They were not sure what the problem was caused by as the sensor seemed to be switching o.k.The garage I then took it to seemed sure,changing the sensor would cure the problem. My car has done 70,000 miles Replies to this message: qbrozen (May 02, 2007 4:41 pm)
#31 of 35 Re: How long after my service did the light come on ? [rogert1] by qbrozen May 02, 2007 (4:41 pm)
Replying to: rogert1 (May 02, 2007 1:22 pm) sorry, i forgot you said that. it was a full day ago and i've read alot of things since then. ;b   well, all i've got for you is the plug issue i mentioned earlier. I never had the plugs throw a CEL for me, but they definitely caused a hard-starting issue for me (excessive cranking to get it to kick over). They also fouled out on me prematurely. And those were the expensive iridium tipped (i think that's what they're called). Once I went back to OEM, everything was well with the car again.
#32 of 35 Fuel light by rogert1 May 08, 2007 (9:20 am)
8/5/07 Latest on the engine light; C70 went in for its MOT today.They tested it with the engine light on for the emmissions and it passed no problem at all.The diagnostic code was PO172.and it said "System too rich" Bank 1 (2). I,ll phone the main dealer tomorrow with that code to see what they say.I drove for 80 miles over the weekend and the engine light had been reset (off).We had to stop to open a gate, and on it came! Ive got some volvo original plugs now which after ive spoken to the guy at volvo re the code ,ill fit if he thinks it will do the trick. Watch this space
#33 of 35 Engine Light on C70 by rogert1 Jun 16, 2007 (11:23 am)
Just to let you know , my Engine light on has been cured following the fitting of a new MAF sensor, at the cost of £200 and 50p!+ labour and V.A.T.
#34 of 35 Re: Milage [empty1] by jimtaylor1 Jul 25, 2007 (7:39 pm)
Replying to: empty1 (Mar 18, 2007 3:27 am) I have a 2006 C70 that gets 25 to 26 mpg using regular fuel on combo highway and local driving.
#35 of 35 2007 C70 Mileage by jeckles Aug 27, 2007 (12:33 pm)
Hi!   We finally got our C70 delivered just before July 4th via OSD.   We are still collecting mileage data (and still going through break-in). The first few tanks were a bit depressing, until break-in when we started seeing 27-28 combined driving and 29+ on highway using premium (93). Some of the fuels are oxygenated (10% ethanol), which likely accounts for the variability in milage (along with traffic).   I accidentally put regular (87) in the tank a few weeks ago and dropped the gas mileage down to 24-25 combined (city/hwy). So for us in the midwest, where premium is only $0.20/gal more, it is slightly cheaper to use premium gas because we get better fuel economy {driving 350 mi costs $37.90 for 87 octane and $37.62 for 93 octane with regular costing $2.65 and premium $0.20 more}.   Pretty cool huh

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