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Topic: poor MPG (Read 2173 times) |
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
 
Posts: 34
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im getting poor MPG out of my 2.5td
low 30 on a long run and low 20 around town.
im not heavy footed and just did a 300mile round trip last weekend and got 35MPG whilst driving economically.
never went over 70MPH and did not boot it either.
noticed few times when i did put my foot down that there was loads of black smoke coming from the rear.....turbo boost is working ok ...
full service was done 1000mls ago and a good fuel cleaner was put in the tank with less that 1/4 full.
any ideas what i can do to improve this MPG as what im getting is poor .
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Nothing like a classic
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Scorpio
Full Member
Posts: 562
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Re: poor MPG
« Reply #1 on: Apr 12th, 2012, 10:24pm » |
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Black smoke relates to over fuelling. Do you have a MAF valve?
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
Posts: 34
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Re: poor MPG
« Reply #2 on: Apr 12th, 2012, 10:41pm » |
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There is a MAF on the output of the air box
And that's working as if I disconnect it
I can drive but no turbo power
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Nothing like a classic
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Snoopy
Administrator
Very old.BAD tempered and missing friends.
Posts: 6278
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Re: poor MPG
« Reply #3 on: Apr 13th, 2012, 7:35am » |
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It may well be working but is it clean? Give it a good squirt of carb cleaner DO NOT TOUCH THE WIRE ELEMENT INSIDE and see if things improve.
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
Posts: 34
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Re: poor MPG
« Reply #4 on: Apr 14th, 2012, 9:58pm » |
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found out today that the MAF is faulty so looking for a working 1.
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Nothing like a classic
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Scorpio
Full Member
Posts: 562
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Re: poor MPG
« Reply #5 on: Apr 15th, 2012, 1:23am » |
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New Bosch unit, special order from Germany. £220+ VAT.
Used very rare and no guarantee of reliability or longevity.
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: poor MPG
« Reply #6 on: Apr 15th, 2012, 8:57am » |
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Might be worth looking at MAF's from other vehicles the 2.5TD is installed in 
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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Tompion
Administrator
1997 2.3 Ultima estate.
Posts: 2918
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Re: poor MPG
« Reply #7 on: Apr 15th, 2012, 1:16pm » |
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Try searching on Ebay using just the part no – I’ve bought them from other cars for my 2.3 that way.
If you google the part no you may find a list of other cars that use it.
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ABS multiplug wheel sensor pins MK IV or MK 20
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Scorpio
Full Member
Posts: 562
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Re: poor MPG
« Reply #8 on: Apr 15th, 2012, 2:49pm » |
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Non generic, that I know of.
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
Posts: 34
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Re: poor MPG
« Reply #10 on: May 13th, 2012, 5:22pm » |
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well got me a new MAF for £35.00 off the jeep and car is running much better
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Nothing like a classic
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Scorpio
Full Member
Posts: 562
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Re: poor MPG
« Reply #11 on: May 13th, 2012, 8:46pm » |
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What Jeep model is this and is it a direct fit. Also is £35 brand new or used
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
Posts: 34
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Re: poor MPG
« Reply #12 on: May 13th, 2012, 10:31pm » |
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Chrysler Jeep Cherokee Mk2 XJ, 2.5 Diesel Air Flow Mass Meter Sensor
This is brand new PART NUMBERS FOR THIS ITEM WOULD BE : 04883258 or 771 - 93A - 106
Interchange 0281002156
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Nothing like a classic
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Scorpio
Full Member
Posts: 562
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Re: poor MPG
« Reply #13 on: May 13th, 2012, 10:50pm » |
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Thank you for this info. Great news 
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: poor MPG
« Reply #14 on: May 14th, 2012, 5:35pm » |
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I got a topic notification!!
If it's any interest there's a topic going on at the Moto Guzzi GB forum, re how the modern injected models seem to have worse or no better consumption than the older carburettor bikes!
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Mike H
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PJDavis
Senior Member
2 x 1995 Jag X300 3.2 / 4.0 (Henley) 1957 XK140
Posts: 1474
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Re: poor MPG
« Reply #15 on: May 14th, 2012, 6:13pm » |
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Talking of Bikes, My 1980 Laverda Jota has terrible fuel consumption, always has had since I bought it brand-new. Same goes for my Yam' MT01. But both Bikes get driven hard when I get a chance to ride them.
And the MT01 with the stage two finished with the fresh pipes, removable baffles of course!
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I love 'Movvy'
1995 Jaguar XJ6 X300 3.2 (Henley)
1995 Jaguar XJ6 X330 4.0 (Dopey)
1957 Jaguar XK140 USA (converted to RHD, and to have fitted Mk10 420G Engine with BW 65 Auto Trans)
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: poor MPG
« Reply #16 on: May 16th, 2012, 4:17pm » |
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Well "driven hard" might not be helping
Difficult as it may be to resist I know
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Mike H
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