Author |
Topic: Low MPG on 2.3L (Read 790 times) |
|
geraghtyg
Full Member
2001 XG25
 
Posts: 215
|
 |
Low MPG on 2.3L
« on: Apr 5th, 2004, 2:37pm » |
 Quote  Modify
|
Hi
My recently aquired 2.3L ultima seems to be suffering from very low MPG. In the first few days that I got it, it was averaging about 22MPG on journeys which consisted of 2/3 urban and 1/3 motorway driving.
I then cleaned the MAF sensor with carb cleaner (one of the wires was very dirty). Then with a sparkling clean MAF sensor and new air filter I set off for a weekend in the country. THe drive consisted of about an hour of drving each way and was all either motorway or on quiet country roads and the roads were clear. Cruise control was on most of the time, air con was on about 1/2 the time and motorway spped was a constant 75mph with country roads about 50mph. This resulted in an average of 26.5MPG for both trips - Very low by anyones standards. Any ideas on what could be causing this.
This morning's journey to work resulted in 23.3MPG and the traffic wasn't too bad - ABout 16miles drive.
Graham
|
|
 IP Logged |
Graham G, Dublin, Ireland
|
|
|
admin
Administrator
The Big Boss
Posts: 1410
|
|
Re: Low MPG on 2.3L
« Reply #1 on: Apr 5th, 2004, 5:39pm » |
Quote Modify
|
I would have expected you to get around 30mpg on your long run. I assume you are using the fuel computer rather than a brim to brim refuel to check mpg - might be a problem with the fuel computer sensors so a check over a couple of tank fulls might be worth doing.
Check also that you don't have a binding brake (seized caliper) and that the wheel bearings are ok. Also try without a/c on as a seizing compressor will drag a lot of power from the engine and lower mpg.
Also check your tyre pressures.
An OBD2 check would also be useful to monitor the fuel trims which might indicate a air leak somewhere or a failing lambda sensor.
I am assuming that the engine is idling and running perfectly ok.
Just a few thoughts to keep you going (and to give you things to worry about LOL)
Steve
|
|
IP Logged |
|
|
|
geraghtyg
Full Member
2001 XG25
Posts: 215
|
|
Re: Low MPG on 2.3L
« Reply #2 on: Apr 5th, 2004, 6:23pm » |
Quote Modify
|
Thanks Steve
I am using the computer. I have only done 260 miles on this tank and according to the computer there are less than 90 miles left. The needle on the fuel gauge is nearly into the red at this stage. The tank was filled to the brim the other day. The service screen said there was 68.4 litres in it when I filled it - fairly accurate there. Tyre pressure is fine. I checked that the day I bought the car. Brakes don't appear to be binding. If I slap her into neutral, she rolls forever. And the engine still sounds silky smooth, almost 6 cylinder like  Idles fine - Looks like a shade under 800cc on the tachometer and steady. Noticed the passenger seat heater isn't working - Better try the connections underneath. At least mine works - That's the important thing.
|
|
IP Logged |
Graham G, Dublin, Ireland
|
|
|
Kenboy
Full Member
I'm a YaBB newbie!
Posts: 703
|
|
Re: Low MPG on 2.3L
« Reply #3 on: Apr 5th, 2004, 8:18pm » |
Quote Modify
|
Hi I to have a 2.3 and your mpg is just about right, If I am light on the pedal about 300 to a full tank I reached this conclusion after chatting to other owners of these cars and alas the concensus of opinion bears this out.
Thirsty beasts arn't they.
regards Kenboy
|
|
IP Logged |
|
|
|
geraghtyg
Full Member
2001 XG25
Posts: 215
|
|
Re: Low MPG on 2.3L
« Reply #4 on: Apr 6th, 2004, 8:40am » |
Quote Modify
|
Wow, they are fond of the drink, aren't they  I really wasn't it expecting it to be this thirsty. Looks like I'm gonna have to do more overtime on a regular basis! Seems to be as thirsty as a 6 cylinder. I have been light on the throttle myself and just passed the 300 mile mark on the way to work this morning. The low fuel chimes gave their first sounding last night and by the time I got to work this morning, the fuel guage was showing 35 miles even though the needle is about 2/3 thirds the way through the red section of the fuel guage. Getting a bit worried that the fuel will run. I had better fill up in the cheapest petrol station on the way home from work today - Only 81.3c per litre - Good old Tesco 
|
|
IP Logged |
Graham G, Dublin, Ireland
|
|
|
Steve_S
Full Member
1997 scorpio ultima 2.9 24v lpg
 
Posts: 655
|
|
Re: Low MPG on 2.3L
« Reply #5 on: Apr 6th, 2004, 11:58am » |
Quote Modify
|
My 24v looks good then with an average of 24mpg, no hanging around.
|
|
IP Logged |
Steve S
|
|
|
geraghtyg
Full Member
2001 XG25
Posts: 215
|
|
Re: Low MPG on 2.3L
« Reply #6 on: Apr 6th, 2004, 12:23pm » |
Quote Modify
|
If I could afford the road tax and could also get insurance, I would have a Cozzie. There's also the problem of there being very few to buy over in this Godforsaken kip.
There was one for sale recently for €3,000 but it was a '95 and that's getting a bit too old for my liking. Still, if I could afford it, I'm sure my gut would give in and I would have to and buy it.
|
|
IP Logged |
Graham G, Dublin, Ireland
|
|
|
iainc
Junior Member
Posts: 77
|
|
Re: Low MPG on 2.3L
« Reply #7 on: Apr 15th, 2004, 1:07pm » |
Quote Modify
|
After cleaning the MAF, recently drove approx 90 miles down M6 to Manchester airport - 2 of us, plus luggage and skiis - and managed 34.9 (= best ever) (mostly c-c and with a-c off), and then about 33.5 (a-c on) on return journey (must be more uphill). More usually, my '97 auto ult 2.3 will do 33 +/- 1 on a long run (motorways, A-roads) and 29 +/- 1 on short (approx 15 miles) trips on undulating country roads if treated very gently. I don't do much urban stuff, I'm glad to say; numbers would be much lower. The auto box cars are heavy and thirsty; but for driving a car like it, it's still worth the extra petrol pounds. (still way off the pace of my old 2 litre Granada, which would manage 40 mpg on a long run)
Iain C
|
|
IP Logged |
|
|
|
Alan
Full Member
I Love My Cosi
Posts: 425
|
|
Re: Low MPG on 2.3L
« Reply #8 on: Apr 16th, 2004, 12:22am » |
Quote Modify
|
Hi guys
I have got a 24v cosi and I get about 225 to 250 miles to a full tank. I drive mostly arround town but when I get on the motorway I do tend to blow the cobwebs out, So Do this sound about right. 
Cheers
Alan
|
|
IP Logged |
I have a 95 cosi and I love it
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print