Author |
Topic: Low MPG (Read 1256 times) |
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
Hi Folks, newbee member here in need of some advice please. I now have a 2.9 12V 1995 scorpio that goes well but is only doing 15 MPG according to the computer, is this the norm?. The engine temperature gauge takes ages to get off the stop and the heater is poor - so I assume the thermostat needs replacing. Also the tacho doesn't work? any thoughts - regards
|
|
 IP Logged |
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
 |
Re: Low MPG
« Reply #2 on: Jan 26th, 2006, 5:56pm » |
 Quote  Modify
|
Thanks for that info, my handbook gives MPG for all the variants but for the 2.9 12V states that figures were "unavailable"?. I have been travelling on a fairly straight run to work about 10 miles each way and had hoped to get a bit more out of it than 15, thanks again
regards - Dave
|
|
IP Logged |
|
|
|
music_master
Full Member
I love YaBB 1G - SP1!
Posts: 293
|
|
Re: Low MPG
« Reply #3 on: Jan 26th, 2006, 7:07pm » |
Quote Modify
|
have you tried cleaning the maf other memebers on the site says this helps and improve fuel econony 
|
|
IP Logged |
|
|
|
Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
|
|
Re: Low MPG
« Reply #4 on: Jan 26th, 2006, 7:17pm » |
Quote Modify
|
theres no MAF on the 12v
Is it well serviced etc?
Should definitley be getting more than that, depending on how you drive it of course 
sounds like stat is stuck open or maybe even missing altogether which wouldnt help either.
gearbox behaving ok? (auto?)
tyre pressures correct etc?
brakes binding?
fuel leak?
|
|
IP Logged |
on Oct 17th, 2011, 12:35pm, Simmo wrote:I give up !  Too much for an old boy!  |
|
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
|
Re: Low MPG
« Reply #5 on: Jan 26th, 2006, 7:56pm » |
Quote Modify
|
Hi, I'm told that it has been regularly serviced, it runs fine with no gear box problems and have been driving it very carefully since I found out what it's capable of! Haven't noticed any fuel leaks but will have a good look round and sus out that stat at the weekend -many thanks Dave
|
|
IP Logged |
|
|
|
Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
|
|
Re: Low MPG
« Reply #6 on: Jan 26th, 2006, 8:12pm » |
Quote Modify
|
Im sure the 12v guys out there will have a more ideas of possible causes though
|
|
IP Logged |
on Oct 17th, 2011, 12:35pm, Simmo wrote:| I give up ! Too much for an old boy! |
|
|
|
|
Pauleo
Junior Member
Ultima Estate 2.9 12v
Posts: 66
|
|
Re: Low MPG
« Reply #7 on: Jan 26th, 2006, 9:11pm » |
Quote Modify
|
The tacho problem, try tapping the perspex over the needle while it's running, mine got stuck regularly, its worth a try.MPG could be down to a leaky injector does it start ok or run on a little after stopping?
|
|
IP Logged |
|
|
|
Highlander
Moderator
Expert
13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
Posts: 8244
|
|
Re: Low MPG
« Reply #8 on: Jan 26th, 2006, 9:51pm » |
Quote Modify
|
Has you got standard size wheels/tyres??
|
|
IP Logged |
on Oct 17th, 2011, 12:35pm, Simmo wrote:| I give up ! Too much for an old boy! |
|
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
|
Re: Low MPG
« Reply #9 on: Jan 27th, 2006, 8:02am » |
Quote Modify
|
Hi, Gave it a bash initialy but no luck, didn't even get off the stop. Found the instrument reset and all clocks kicked, so could it be a bad connection? . Tyres are standard 195's. How do you check for a leaking injector? - cheers
|
|
IP Logged |
|
|
|
martin_rowe
Full Member
I love YaBB 1G - SP1!
Posts: 879
|
|
Re: Low MPG
« Reply #10 on: Jan 27th, 2006, 8:34am » |
Quote Modify
|
if engine temp is low it will run rich, check / replace t/stat first, if you have fuel leak you would smell it, also check operation of llambda sensors & for vacuum leaks.
|
|
IP Logged |
Rally Drivers Do It Sideways
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
|
Re: Low MPG
« Reply #11 on: Jan 27th, 2006, 10:39am » |
Quote Modify
|
Haven't noticed any fuel smells when driving and had no problems with over running or starting although a colleague said he thought the exhaust smelt very petrol/oily as I pulled away. Will look up how to check that sensor etc - Thanks
|
|
IP Logged |
|
|
|
david_molloy
Full Member
I'm a YaBB newbie!
Posts: 172
|
|
Re: Low MPG
« Reply #12 on: Jan 28th, 2006, 12:07am » |
Quote Modify
|
I'd start with the stat.
If opening too soon engine will be running on part "choke" as only luke warm - not good for economy!!!
But first try covering 50 - 70% of radiator with silver wrap.
Go for a spin & see if any improvement after a couple of miles. Should be obvious.
Easy & cheap to do.
david
|
|
IP Logged |
|
|
|
Ultima_Stu
Junior Member
I love YaBB 1G - SP1!
Posts: 66
|
|
Re: Low MPG
« Reply #13 on: Jan 28th, 2006, 10:41am » |
Quote Modify
|
I have run a 12v for a couple of years now and struggle with very low 20's in the winter (with +5/6 in the summer months) average. Tried most things including checking for a blocked cat at the start.
I have now accepted these models just burn fuel for fun! (unlike it's MKIII version)
|
|
IP Logged |
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
|
Re: Low MPG
« Reply #14 on: Jan 28th, 2006, 2:19pm » |
Quote Modify
|
Tried the tin foil trick..Heater much improved, MPG no better though. Bought a new stat £15! from fords, Hoping to get it fitted tomorrow. If I can get 20 MPG that would be a 30% improvement - any more thoughts appreciated - regards
|
|
IP Logged |
|
|
|
Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6278
|
|
Re: Low MPG
« Reply #15 on: Jan 28th, 2006, 3:38pm » |
Quote Modify
|
I agree with ultima Stu Low 20's in winter but a lot lot better in Summer.
|
|
IP Logged |
HELP the FORUM.Please DONATE
|
|
|
DaveN
Newbie
I'm a YaBB newbie!
Posts: 19
|
|
Re: Low MPG
« Reply #16 on: Jan 28th, 2006, 11:40pm » |
Quote Modify
|
I know it's warmer in summer but why is it so different between summer and winter? also is it just the 12V or has anyone else noticed large variations in MPG with other engines? -
|
|
IP Logged |
|
|
|
Ultima_Stu
Junior Member
I love YaBB 1G - SP1!
Posts: 66
|
|
Re: Low MPG
« Reply #17 on: Jan 29th, 2006, 11:45am » |
Quote Modify
|
I just put it down to lights, heated things etc in the winter. The a/c is never turned off and makes no noticeable difference in consumption but at least the cabin never 'steams up'.
|
|
IP Logged |
|
|
|
Paulus
Full Member
Big and Ugly....DON'T MESS!!!
Posts: 150
|
|
Re: Low MPG
« Reply #18 on: Jan 29th, 2006, 3:47pm » |
Quote Modify
|
Hi Guys,
FYI.
On a run, using cruise control on my 12v estate, I get the following MPG according to the computer.
65mph - 35mpg
70mph - 30mpg
80mph - 25mpg 
Around town the figure is scary, so I don't look 
Paul.
|
|
IP Logged |
If I said you had a beautiful body.....
|
|
|
KronosKeylock
Newbie
Why do you need a 3 litre?
Posts: 35
|
|
Re: Low MPG
« Reply #19 on: Jan 29th, 2006, 5:08pm » |
Quote Modify
|
It could be tied in with my poor warm starting problems, which as far as I gan gather could be caused by the fuel system overpressurising, how does yours start after a good run?
Happy 12v motoring, (If it had any more holes in the head it would piss more petrol, expect two lungs are better than one comments from cossie owners)
|
|
IP Logged |
2.9 !12 Valve
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print