17 MPG??
#1
Scooby Regular
Thread Starter
Join Date: Feb 2003
Location: Beautiful Edinburgh
Posts: 380
Likes: 0
Received 0 Likes
on
0 Posts
Just measured my town running fuel consumption of Optimax today and it's 17 MPG!
I am not heavy footed and rarely bring the turbo in in the town. Could there be a problem somewhere? It appears to drive fine enough although on light acceleration there seems to be very slight surging, as if the turbo spools up and then stops, spoools up again etc etc.
Maybe I'm wrong but I would have expected around 25 MPG the way it's driven.
Help chaps please this'll kill my wallet if it goes on much longer!!
I am not heavy footed and rarely bring the turbo in in the town. Could there be a problem somewhere? It appears to drive fine enough although on light acceleration there seems to be very slight surging, as if the turbo spools up and then stops, spoools up again etc etc.
Maybe I'm wrong but I would have expected around 25 MPG the way it's driven.
Help chaps please this'll kill my wallet if it goes on much longer!!
#3
If your worried about fuel dont buy a 4wd turbo sportscar...:-)
I never think twice about my fuel because i realised the implications when i bought my beast and love every min i am in it.
Its normal mpg your getting...maybe think about buying a day to day diesel car and have the scooby as the second car, my sccoby is the second car..so maybe dont hit me wallet as much as yours..
I never think twice about my fuel because i realised the implications when i bought my beast and love every min i am in it.
Its normal mpg your getting...maybe think about buying a day to day diesel car and have the scooby as the second car, my sccoby is the second car..so maybe dont hit me wallet as much as yours..
#5
Scooby Regular
Thread Starter
Join Date: Feb 2003
Location: Beautiful Edinburgh
Posts: 380
Likes: 0
Received 0 Likes
on
0 Posts
I do know what I bought and I did expect heavier fuel consumption than I was used to, but I don't drive the car hard in town and two of my friends have exactly the same car and get far better consumption than I do so there IS something not right. I can do without the 'buy a diesel if you want good fuel consumption' comments, you are missing the point. Thank you.
Trending Topics
#8
Scooby Regular
Join Date: Sep 2003
Location: Isle of Wight
Posts: 2,720
Likes: 0
Received 0 Likes
on
0 Posts
I can do without the 'buy a diesel if you want good fuel consumption' comments, you are missing the point
Personally my car almost never sees a motorway, and that's the sort of mileage I get, whether I've been hoofing it or not, on a full tank (about 40 odd quids worth) I expect to get 220-230 miles, it never changes whether the weathers bin bad or not.
If you really do believe your vehicle is at fault other people may be able to suggest something. When you say a "slight surging", exactly what do you mean? That the power suddenly comes in and then drops off again, or just that the power suddenly comes in?
#9
Scooby Regular
Thread Starter
Join Date: Feb 2003
Location: Beautiful Edinburgh
Posts: 380
Likes: 0
Received 0 Likes
on
0 Posts
It's a 00MY no engine mods yet other than an ITG filter.
It's almost as if you are playing with the throtle...on and off on and off...... very slight but it's there.
My mate has a 98MY with 285 BHP and gets 24-26 in town. My one is standard so should get at least the same. I am hoping that the de-cat next week helps.
It's almost as if you are playing with the throtle...on and off on and off...... very slight but it's there.
My mate has a 98MY with 285 BHP and gets 24-26 in town. My one is standard so should get at least the same. I am hoping that the de-cat next week helps.
#10
Scooby Regular
Join Date: Feb 2002
Location: oustide the asylum?
Posts: 3,306
Likes: 0
Received 0 Likes
on
0 Posts
Could be the lambda sensor is getting ready to die, or the coolant temp sensor is acting up. Both of these will cause rich running and possible hesitation.
Are the exhaust pipes sooted up?
PS My rattly old MY96 gets 23 to 25 mpg in town
[Edited by dnb - 12/14/2003 9:49:49 PM]
Are the exhaust pipes sooted up?
PS My rattly old MY96 gets 23 to 25 mpg in town
[Edited by dnb - 12/14/2003 9:49:49 PM]
#14
If you're getting less than 25mpg on a long & gentle journey, your lambda's knackered. 20mpg is not normal or expected for typical driving! Lambda sensors should be replaced every 30k or 3 years - they are a consumable. As they age, they under-read, causing the ECU to overfuel on cruise - bad for economy, the pocket & the bores, over time!
If your 'on boost' performance is fine, it's quite possible your lambda's knackered. I'd get it sorted if I were you If your 'on boost' performance has gone a bit odd, look for leaks & stuff
If your 'on boost' performance is fine, it's quite possible your lambda's knackered. I'd get it sorted if I were you If your 'on boost' performance has gone a bit odd, look for leaks & stuff
#15
Scooby Regular
Join Date: Sep 2003
Location: Isle of Wight
Posts: 2,720
Likes: 0
Received 0 Likes
on
0 Posts
My mate has a 98MY with 285 BHP and gets 24-26 in town.
I agree with DNB on the Lambda as this measures the mixture as it comes out of the engine. As these fail your engine then tends to run rich. It's my understanding that they start to go after about 30k.
#16
Scooby Regular
Thread Starter
Join Date: Feb 2003
Location: Beautiful Edinburgh
Posts: 380
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the tip guys, I'll change the lambda and see if that makes a difference.
Any idea how much they are and how easy to change. I would assume it's just a swop out and no re-setting of anything needed?
[Edited by Derek FKS 85 - 12/15/2003 7:42:28 AM]
Any idea how much they are and how easy to change. I would assume it's just a swop out and no re-setting of anything needed?
[Edited by Derek FKS 85 - 12/15/2003 7:42:28 AM]
#17
Scooby Regular
Join Date: Jul 2003
Location: Out of darkness cometh light
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
Motor Factors in Edinburgh You don't need to, but if you reset the ECU, it would also give you the opportunity to see if your MAF's OK.
#19
Scooby Regular
Join Date: Jul 2003
Location: Out of darkness cometh light
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
#21
I also have an my00, and found that the best i've ever managed is 240 miles to a tank, but it's generally less.
I'm led to believe that the 802 ecu, over fuels quite considerably. Good for knock, bad for economy! Also I experienced the hesitation on acceleration, mainly in higher gears. Is this the same as you?
I changed to a Tek 2 ecu on Saturday, and this seems to have stopped the hesitation. So i think it was a trait of the standard map.
Hope this helps
I'm led to believe that the 802 ecu, over fuels quite considerably. Good for knock, bad for economy! Also I experienced the hesitation on acceleration, mainly in higher gears. Is this the same as you?
I changed to a Tek 2 ecu on Saturday, and this seems to have stopped the hesitation. So i think it was a trait of the standard map.
Hope this helps
#22
Scooby Regular
Join Date: Jul 2003
Location: Out of darkness cometh light
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
Why dodgy?! It's dead easy, honest...
As for the hesitation and over-fuelling, you're right, they are known AE802 characteristics. A manual boost controller can help. It's a hell of a lot cheaper than a re-map, although admittedly not as safe. It helps my taking advantage of the slightly richer fuelling, and also bypasses the boost solenoid, which can be one of the things that causes hesitation (mine did anyway!). Just be cautious, as you're taking control away from the ECU. A few gauges are awlays a good idea...
As for the hesitation and over-fuelling, you're right, they are known AE802 characteristics. A manual boost controller can help. It's a hell of a lot cheaper than a re-map, although admittedly not as safe. It helps my taking advantage of the slightly richer fuelling, and also bypasses the boost solenoid, which can be one of the things that causes hesitation (mine did anyway!). Just be cautious, as you're taking control away from the ECU. A few gauges are awlays a good idea...
#23
I had this with my old MY 00 and changed the AE802 ECU for an older (but better) AE801 ECU. Not sure if the fuel economy got better, but the hesitation disappeared. Is the hesitation around the 3 to 4 k rpm range ? I would go along to your local meet and ask someone with a MY 99 if you can try there ECU for 30 mins or so
If your near to Bristol, you welcome to try mine
I've since got rid of the MY 00 and bought a MY 99. I had a Tek 2.5 (John Banks) fitted and can honestly say car is returning 32 MPG on a run with air con on So I get better performance and as a result fuel economy is increased over the stock MY 99 ECU and MY 99 PPP ECU If you keep the car for a few years, the remap is the way forward. A AE801 will set you back £150 second hand. A Tek 1 flashed onto your AE802 will make a hell of a difference
Hope this helps, Phill
If your near to Bristol, you welcome to try mine
I've since got rid of the MY 00 and bought a MY 99. I had a Tek 2.5 (John Banks) fitted and can honestly say car is returning 32 MPG on a run with air con on So I get better performance and as a result fuel economy is increased over the stock MY 99 ECU and MY 99 PPP ECU If you keep the car for a few years, the remap is the way forward. A AE801 will set you back £150 second hand. A Tek 1 flashed onto your AE802 will make a hell of a difference
Hope this helps, Phill
#24
Scooby Regular
Thread Starter
Join Date: Feb 2003
Location: Beautiful Edinburgh
Posts: 380
Likes: 0
Received 0 Likes
on
0 Posts
Thanks guys.
I went to my local dealer at lunchtime and he basically confirmed that the hesitation is a trait of the car, which I am quite happy with. I also bought a lambda sensor which I'll fit tonight. He also said that this was the most likely cause of poor consumtion.
Hope I havn't wasted my £104!!!!!!!!
[Edited by Derek FKS 85 - 12/15/2003 2:05:20 PM]
I went to my local dealer at lunchtime and he basically confirmed that the hesitation is a trait of the car, which I am quite happy with. I also bought a lambda sensor which I'll fit tonight. He also said that this was the most likely cause of poor consumtion.
Hope I havn't wasted my £104!!!!!!!!
[Edited by Derek FKS 85 - 12/15/2003 2:05:20 PM]
#25
Scooby Regular
Join Date: Jul 2003
Location: Out of darkness cometh light
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
422 miles to a tank?!?!?!? You sure that's right? You'd better not let Gordon Brown here about it. He'd probably impose excise duty on Tek remaps...!
#26
As I said 32 MPG consistantly, but I have to take it quite easy and cruise around 80 to 90 MPH
I never run the tank empty, as I don't like doing that, but will see 320 to 340 on 7/8 of a tanks In fairness though around a track I can get that as low as 7 MPG
Phill
I never run the tank empty, as I don't like doing that, but will see 320 to 340 on 7/8 of a tanks In fairness though around a track I can get that as low as 7 MPG
Phill
#27
Scooby Regular
Join Date: Jul 2003
Location: Out of darkness cometh light
Posts: 1,457
Likes: 0
Received 0 Likes
on
0 Posts
I suppose if my willpower was good enough to drive around without invoking the turbo, I could probably get more out of a tank... but it isn't, so I'll have to make do with 220 ish out of 50 litres.
#30
Scooby Regular
Join Date: Apr 2003
Location: Location: Location:
Posts: 1,097
Likes: 0
Received 0 Likes
on
0 Posts
Thankfully the 03's are more efficient! I get 30mpg easily on a long run, even when averaging 50mph on winding roads in Scotland.
Sorry, I know this isn't helping your case, but it's useful info.
Sorry, I know this isn't helping your case, but it's useful info.