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Topic: 2.3 low mpg (Read 639 times) |
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craigs2007
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2.3 low mpg
« on: Apr 20th, 2008, 10:13am » |
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Hi,
Ive got a 2.3 scorp on a p reg.Done 127k.I dont know if there is some kind of problem with it because according to the trip computer im only gettin 18.4-18.6 mpg..Even on a motorway run at 60-70 mph thats all im getting..Is that about right or should it be more?
Thanks
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gozz
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Re: mpg
« Reply #1 on: Apr 20th, 2008, 11:03am » |
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craigs 2007
You should get 30 mpg from a 2.3.You need a fault code readout to reveal the problem if there is nothing obvious.Things like Lambda sensors and manifold pressure sensors will come up.No doubt your exhaust is very black ! Any unit that relies on vacuum for it's operation will send false messages to the PCM if there is a blockage or leakage.There may be a member near you with OBD2 reader.Whatever you do keep away from FMD,a little local man is better value for money.
GOZZ
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gost
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Re: mpg
« Reply #2 on: Apr 20th, 2008, 11:37am » |
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mines only 17.5 but mainly round town
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2.3 ultima
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gozz
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Re: mpg
« Reply #3 on: Apr 20th, 2008, 11:46am » |
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gost.
Yours must be suffering a malady as well ! I have a 2.3 hearse which is a big bluff heavy beast,it works locally and rurally and always returns a minimum of 27 mpg.When I drive it myself it gets a d**ned good clearout,and still gives the MPG.Our 2.9 12v versions are never below 20mpg overall,and often return 23mpg when the old geysers drive em !
GOZZ
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Scorpio_Mike
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Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
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Re: 2.3 low mpg
« Reply #4 on: Apr 20th, 2008, 2:40pm » |
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I get around 21.5 ~ 22.0 mpg from my 2.3 auto...but that is quite a lot of town driving and short runs. Goes up to about 30 on a good long run though.
Maybe I need to get mine checked too !
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
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Re: 2.3 low mpg
« Reply #5 on: Apr 21st, 2008, 11:46am » |
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Ditto with Gozz, you're looking for bad lambda sensor or something. Could also be a coolant temp sensor or something, if the ECU thinks the engine's cold it'll run rich and kill your mpg. It's worth asking whether there's any driveability issues, does it lose power or stumble on the throttle or anything?
Long shot but if you're anywhere near Colchester in Essex I have the full OBD laptop kit, could do you a scan.
Back to the MPG issue, we've been here before. Mine would drink like a fish, the only way I could've hoped to touch 30mpg would've been downhill with no throttle  . about 18-20 in town, 24 on a run, 26 if I was a good boy and set the cruise at 70. Perhaps the lambdas were tired but it used to get good fuel and a good run at high speed on open roads most of the time, ran fine otherwise...just very thirsty.
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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craigs2007
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Re: 2.3 low mpg
« Reply #6 on: Apr 21st, 2008, 9:40pm » |
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on Apr 21st, 2008, 11:46am, TiberiuS wrote:Ditto with Gozz, you're looking for bad lambda sensor or something. Could also be a coolant temp sensor or something, if the ECU thinks the engine's cold it'll run rich and kill your mpg. It's worth asking whether there's any driveability issues, does it lose power or stumble on the throttle or anything?
Long shot but if you're anywhere near Colchester in Essex I have the full OBD laptop kit, could do you a scan.
Back to the MPG issue, we've been here before. Mine would drink like a fish, the only way I could've hoped to touch 30mpg would've been downhill with no throttle . about 18-20 in town, 24 on a run, 26 if I was a good boy and set the cruise at 70. Perhaps the lambdas were tired but it used to get good fuel and a good run at high speed on open roads most of the time, ran fine otherwise...just very thirsty.
Regards, Bruce. |
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Hi,
Car runs great except for the mpg..Im in cardiff so not much chance of you doing me a scan..Thanks tho
So you are saying its either a bad lambda sensor or coolant temp sensor?
What steps should i take?
Thanks
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gozz
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Re: 2.3 low mpg
« Reply #7 on: Apr 21st, 2008, 11:06pm » |
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craigs2007.
Short of time consuming unit substitution(the lambdas are awkward)find yourself a reliable small workshop with a good scanner man.He would'nt necessarily have to do the repairs,just tell you what's at fault.Small places usually charge £25-£40 to tell you what you need to know.
GOZZ
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python9
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1997 24v ghia saloon
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Re: 2.3 low mpg
« Reply #8 on: Apr 21st, 2008, 11:15pm » |
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lambdas ARE A GOOD BEST TO START WITH AS THEY CAN CAUSE ALL SORTS OF FAULTS
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
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Re: 2.3 low mpg
« Reply #9 on: Apr 22nd, 2008, 11:56am » |
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Hi. Ditto with Gozz (again  ), if you start replacing parts at random you'll be going on a wild goose chase and it'll get expensive.
A garage with a decent OBD scanner will be able to show codes and get some sensor data for you, a fault in either coolant temp sensor or lambdas should show up clearly on a scan. As I remember the Scorp has 2 coolant sensors (somebody correct me if I'm wrong), one for the ECU and one for the temp gauge etc. Could also be a wiring issue but that'd likely cause loads of other symptoms too.
Just don't go to Ford's, it'll cost you a fortune before you've even started.
Hope this helps.
Regards, Bruce
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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sector-9
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No scorpio anymore
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Re: 2.3 low mpg
« Reply #10 on: Apr 23rd, 2008, 10:51pm » |
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Two other things to check are sticking brakes (check for hot wheels after a drive), and tyre pressures, which can make a significant difference. FWIW, I've found that most manufacturers quote very low pressures in their handbooks (presumably for ride comfort), but the cars often run better with about 5psi extra in them...
Darren
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