Fordmods Logo

Poor Fuel Economy 

 

Page 1 of 2 [ 23 posts ] Go to page 1, 2  Next

 
 Post subject: Poor Fuel Economy
Posted: Sun Apr 22, 2007 4:28 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 5924

Joined: 5th Nov 2004

Gallery: 7 images

Ride: Ford FPV FG F6 310

Power: 149 rwkw

Location: Brisbane
QLD, Australia

The AU I have is getting real poor fuel consumption lately. I'm actually selling it but i want to fix this up first.
I ran a scan tool on it, and it came up with an open circuit knock sensor.
Would this cause poor fuel economy, or is it just a timing thing thats affected?
I also noticed the temp gauge hardly moves at all. Even on a warm day it moves just over the line where C is.

I was thinking of replacing the knock sensor and thermostat first, but the car runs nice and the thermo fans kick in and out as per normal.

Any Ideas??

 

_________________

NEW RIDE - FPV FG F6 6spd Auto. 12.26@114MPH, 1.88 60FT on Cheapy Tyres with 38PSI - Stock except K&N filter!

R.I.P. BF XR6 Turbo - You will not be forgotten :( 12.06@120MPH

Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 4:43 pm 
Smokin em up
Offline
User avatar

Age: 30

Posts: 290

Joined: 10th May 2006

Ride: 5 Spd EA Wagon, 5 spd EF Fairmon

Location: Melbourne
VIC, Australia

i know that poor fuel economy is normally an oxy sensor issue.. especially if its over 100,000 ks old..
I'm not sure about knock sensor, but possibly with the timing out of whack, it might produce poor economy...

 

_________________

If you're not driving a manual, you are only steering...

Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 5:07 pm 
Fordmods Newbie
Offline
User avatar

Posts: 13

Joined: 9th Jan 2006

Location: Linuxville
VIC, Australia

timing is set by the ecu,try clean the oxygen sensor with some carb clean,that may help,or just buy a new one off ebay for $55,is it chuging smoke from the exhaust? maybe the maf sensor has shat,$200 from Fraud,that would be my first poirt of call anyways after the o2 sensor hope this helps
Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 5:26 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 5924

Joined: 5th Nov 2004

Gallery: 7 images

Ride: Ford FPV FG F6 310

Power: 149 rwkw

Location: Brisbane
QLD, Australia

nar no smoke at all, the car runs perfectly, dosent miss or hunt for idle or anything. it just uses ALOT of fuel.

 

_________________

NEW RIDE - FPV FG F6 6spd Auto. 12.26@114MPH, 1.88 60FT on Cheapy Tyres with 38PSI - Stock except K&N filter!

R.I.P. BF XR6 Turbo - You will not be forgotten :( 12.06@120MPH

Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 5:47 pm 
Smokin em up
Offline

Posts: 200

Joined: 3rd Oct 2005

Ride: XC GXL

Location: Townsville
QLD, Australia

crap my car gives quite a lot of smoke of when u give it some and has the same temp thing and crap economy , so that means iv got MAF sensor on the books? ....crap
Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 5:59 pm 
Getting Side Ways
Offline
User avatar

Age: 30

Posts: 525

Joined: 27th Jan 2007

Gallery: 3 images

Ride: AUII Ghia 75th LE, KF 1.8S 5spd

Location: S.E Burbz, Melbourne
VIC, Australia

I myself have an au2 and i cant seen to get more than 350 to 400 k's out of it around town.i drive it pretty slow through the week to work and back and the average wont go bellow 14.5 - 15. i have no clue on what it is.its runnin abit rich and ill check it out at work next week but really dont know why i dont get more k's. i brought it because i wanted an economical car but with options and that was comfy.lol

 

_________________

THE Fairmont Ghia : 75th Anniversary LE
Current Mods - 2.5" Exhaust, Custom CAI, Built Gearbox( Mirror Polished Casing+Bellhousing,TCE 2500 custom convertor, Modified Valve Body), Detailed UnderCarriage, SQ Stereo Install = 136+rwkw
http://www.aufalcon.com.au/sikford

Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 6:21 pm 
Getting Side Ways
Offline

Age: 29

Posts: 1538

Joined: 4th May 2006

Gallery: 4 images

Ride: ef fairmont turbo

Power: 213 rwkw

Location: melbourne
VIC, Australia

could be due to alot of things, give the car a good service, check all the basics(thermostat, oxysensor even air filter), i found i get better fuel economy from runnning a thicker oil(15w40) then the reccomended(10w30). my cars temp gauge barely changes either, but i can get it as low as 9.5l/100km.
it also comes down to how and where you drive your car

 

_________________

96 EF FAIRMONT
Garrett gt40turbo, iceman plenum, ported head, turbo cam, double valvesprings, 023 fuel pump, 36lb injectors 4' cat, 4' dump, 2.5 exhaust, build bottom end, hypertonic pistons rods & rods, king bearings, j3. c10 3500 stall
232rwkw@4psi

Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 6:22 pm 
Smokin em up
Offline

Posts: 200

Joined: 3rd Oct 2005

Ride: XC GXL

Location: Townsville
QLD, Australia

hmm mayby someone should write up a theco document explaining where all these sensors are how to get at them and how to clean them ?
Top
 Profile  
 
 
Posted: Sun Apr 22, 2007 6:47 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 5924

Joined: 5th Nov 2004

Gallery: 7 images

Ride: Ford FPV FG F6 310

Power: 149 rwkw

Location: Brisbane
QLD, Australia

i went down to the car and d/c the temp switch at the back of the head and the gauge went to C and the thermos come on hard. i might get the variable pot onto it and check it against the actual coolant temp to work out whether it's running in warm-up mode and if it is, the temp sender could be stuffed.

i also cleaned the o2 sensor and told my bro to drive it around for the next few days and see how it goes.

if its still the same i might have to look into it further to work out what it is and it might even be worth it for me to buy a couple of bits from the wreckers and swap them one by one.

the economy was great when i bought it and that was with old oil, old plugs, old fuel and air filter.

stupid cars!

 

_________________

NEW RIDE - FPV FG F6 6spd Auto. 12.26@114MPH, 1.88 60FT on Cheapy Tyres with 38PSI - Stock except K&N filter!

R.I.P. BF XR6 Turbo - You will not be forgotten :( 12.06@120MPH

Top
 Profile  
 
 
Posted: Mon Apr 23, 2007 7:18 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 1132

Joined: 11th Jun 2006

Gallery: 1 images

Ride: ef fairmont,

Location: brisbane
QLD, Australia

probally something like mine

mine are cam angle sensor, coolant sensor, o2 and ecu problems man

 

_________________

95 ef montfor sale pm for info, 88 hilux mud truck

Top
 Profile  
 
 
Posted: Tue May 01, 2007 11:01 pm 
Getting Side Ways
Offline
User avatar

Age: 33

Posts: 5924

Joined: 5th Nov 2004

Gallery: 7 images

Ride: Ford FPV FG F6 310

Power: 149 rwkw

Location: Brisbane
QLD, Australia

I put a new thermostat in it and it's fixed the cold temp and it dosent miss at idle like it used to.
the gauge now sits between N and O.

with regards to fuel economy, i took it for a 50-60km run and the dte only went down 10km so i think i've fixed it.

I will post results in a week or so, as i will be using it this weekend.

 

_________________

NEW RIDE - FPV FG F6 6spd Auto. 12.26@114MPH, 1.88 60FT on Cheapy Tyres with 38PSI - Stock except K&N filter!

R.I.P. BF XR6 Turbo - You will not be forgotten :( 12.06@120MPH

Top
 Profile  
 
 
Posted: Wed May 02, 2007 12:37 am 
Getting Side Ways
Offline

Age: 29

Posts: 1538

Joined: 4th May 2006

Gallery: 4 images

Ride: ef fairmont turbo

Power: 213 rwkw

Location: melbourne
VIC, Australia

thats good to no, let us know how many liters/100km your doing, ive seen mine in the 9's plenty of times and am averaging about 10.5

 

_________________

96 EF FAIRMONT
Garrett gt40turbo, iceman plenum, ported head, turbo cam, double valvesprings, 023 fuel pump, 36lb injectors 4' cat, 4' dump, 2.5 exhaust, build bottom end, hypertonic pistons rods & rods, king bearings, j3. c10 3500 stall
232rwkw@4psi

Top
 Profile  
 
 
Posted: Wed May 02, 2007 8:09 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 1132

Joined: 11th Jun 2006

Gallery: 1 images

Ride: ef fairmont,

Location: brisbane
QLD, Australia

at least yours are all low i would love mine to be at least the 12 or 13lper100 mark mines at 33l-37lper 100

 

_________________

95 ef montfor sale pm for info, 88 hilux mud truck

Top
 Profile  
 
 
Posted: Wed May 02, 2007 8:16 pm 
Getting Side Ways
Offline
User avatar

Posts: 3363

Joined: 27th Dec 2004

Gallery: 4 images

Ride: MCMXCV Falcon

Location: G town
VIC, Australia

horis wrote:
at least yours are all low i would love mine to be at least the 12 or 13lper100 mark mines at 33l-37lper 100


that is rediculess, i disconnected the O2 altogether and i only got a worst of 15L/100

 

_________________

Image

Top
 Profile  
 
 
Posted: Wed May 02, 2007 8:19 pm 
Getting Side Ways
Offline
User avatar

Age: 29

Posts: 1132

Joined: 11th Jun 2006

Gallery: 1 images

Ride: ef fairmont,

Location: brisbane
QLD, Australia

tell me bout it on the mount cootha cruise i got the best its been at 23lper 100

 

_________________

95 ef montfor sale pm for info, 88 hilux mud truck

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 23 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 34 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sun Dec 17, 2017 9:33 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names