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poor fuel economy - EL Fairmont ? 

 

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 Post subject: poor fuel economy - EL Fairmont ?
Posted: Sun Jul 23, 2006 6:53 pm 
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Location: Sydney
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hi all, sorry if this topic has been covered before, but...

i have a 97 el fairmont, 4.0 litre i6, standard from top to bottom.
she has clocked just over 100,00kms.

we've been filling her up on shell 98 premium for a long time, but it was only recently (what with fuel prices becoming a real concern) that i've noticed that we aren't getting even 400kms to a full tank - the 'less than 80kms of fuel left' alert starts going off around 300-330kms, and by 380kms on the tank it would be just about totally empty. :shock:

now this doesnt sound right at all to me, considering how liberally this car is driven :P ... i would think on any sort of fuel, not just premium, that at least 400kms or more to a full tank would be a reasonable amount to expect? :?

my only guess is that shes running rich for some reason, only thing i can think of is that the ecu is causing this :?: sometimes on idle (esp. after a cold start though) you can also smell a bit of petrol fumes...

how would i go about fixing this problem? my guess is that a reflash of the standard ecu could fix it... does anyone else have any ideas?

and if a reflash is what is needed, where would be the place to go for this?

thanks :D
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Posted: Sun Jul 23, 2006 7:04 pm 
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e series ecu's cant be reflashed, need a piggy back chip.

if ya find the problem, let me know. im usually gettn around 350km before fuel alarm goes off. giving me about 430km from a full tank :(

that gives me an average of 15.8 :\ little higher than id like. thats usually with about 100km freeway driving, rest city traffic

 

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Posted: Sun Jul 23, 2006 8:43 pm 
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i guess try the standard, o2 sensor + injectors, give it a general service and reset the ecu and see how you go?
unfortunately there are some dog engines out there that love fuel, but from a non tickford you would expect better economy than that.
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Posted: Mon Jul 24, 2006 2:15 am 
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hey TheCrystalMethod....first id like to say welcome to fordmods. As YTMONT said....get ur Oxygen sensor replaced and maybe check your injectors. there could also be blockage in the exhaust (doubtful) but check it anyway. Air filter element might also be dirty and not allowing enough air into the engine. But id suggest u check the O2 sensor and injectors first. then the more expensive things. Im having the same problem as u and so far i can only blame the O2 sensor or injectors.

phong =P~

 

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Posted: Sat Jul 29, 2006 11:45 pm 
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Hey YTMONT how do you reset the ECU?
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Posted: Sun Jul 30, 2006 12:01 am 
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Just unplug the negative battery terminal and go for a walk for 10 minutes.
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Posted: Sun Jul 30, 2006 12:04 am 
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Ok cheers
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Posted: Mon Jul 31, 2006 10:47 am 
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Hey. I have been having the same problem with my EF I6. I drive in the hills a fair bit for work. A 40km trip will toll the petrol tank of 60+km. I can get it down to 12.5km/100km but that nanna driving in the city.

The oxygen sensor is the one on the exhaust manifold right?

 

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Posted: Mon Jul 31, 2006 10:50 am 
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stomper wrote:
The oxygen sensor is the one on the exhaust manifold right?
Thats it

 

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Posted: Mon Jul 31, 2006 10:56 am 
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thought so but its better to be safe then sorry.

 

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Posted: Tue Aug 01, 2006 8:27 pm 
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If i was you,i would give it or get it a full service.Replace fuel filter,engine/oil filter and oil,air cleaner,spark plugs,cooling system flush and replace the thermostat.Check tyre pressures/adjust wheel bearings.Check the timing.See how you go from there.I would also suggest checking your exhaust system/for blocks or a melted cat.

 

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Posted: Fri Aug 04, 2006 12:26 am 
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I get 7.8-8l per 100km on cruise control highway at 110km/hr and average between 11-12l per 100km around town.

My sig has my mods
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Posted: Fri Aug 04, 2006 12:43 am 
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hey a mate has the same prob in his el gli but i have a el fairmont and i get at least 500km with a lead foot.

 

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Posted: Fri Aug 04, 2006 1:50 am 
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falcon4litreOHC wrote:
I get 7.8-8l per 100km on cruise control highway at 110km/hr and average between 11-12l per 100km around town.

My sig has my mods


dude thats nice.....wish i had that kinda economy. =(

 

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phongus = Post whore 2006
EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
Max Power = 144.6 rwkw (03/05/2008)

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Posted: Fri Aug 04, 2006 2:53 am 
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The econ button do much? my 97 fairmont has clocked 202,000km on the clock

 

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