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10th February 2011, 21:11 | #1 |
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Rover 75 CDTI saloon Join Date: Oct 2009
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T4 Session and MPG
Hi all.
I seem to be getting really poor MPG from my CDTi. Brim to brim approx 325 miles. I believe this to be approx 22 to the gallon. I do mainly do 2 miles journeys to work and back, but surely it should be better than this. I emailed a local Mg/Rover specialist a couple of days ago, and he said he would have to put my car on a T4. My question is, could this diagnose the problem ? or is it a way for him to make more money. Incidentally the car drives fine, there seems to be no loss of power. I have changed air filter, PCV valve and fitted a EGR bypass. Nigel. |
10th February 2011, 21:24 | #2 |
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Not had my car hooked up to T4 yet but after reading this recent thread from BigRuss below i will definately be getting maff and injectors balance checked at some point!.
http://www.the75andztclub.co.uk/foru...ht=screenshots
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10th February 2011, 21:30 | #3 | |
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75 Contemporary SE Mk II 2004 Man. Sal. CDTi 135ps, FBH on red diesel, WinCE6 DD Join Date: May 2010
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Quote:
Try driving it a sensible distance and check the mpg.
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Harry How To's and items I offer for free, or just to cover the cost of my expenses... http://www.the75andztclub.co.uk/foru...40#post1764540 Fix a poor handbrake; DIY ABS diagnostic unit; Loan of the spanner needed to change the CDT belts; free OBD diagnostics +MAF; Correct Bosch MAF cheap; DVB-T install in an ex-hi-line system; DD install with a HK amp; FBH servicing. I've taken a vow of poverty. To annoy me, send money. |
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10th February 2011, 22:30 | #4 |
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I agree with Harry in 2 miles its not likely to be getting warm enough to reach its best thermal efficiency. Try filling the tank zero the miles and go for a decent run, say 50 - 100 miles, a trip to the coast may be. When you get back fill her up and see what you got. If its anything like the norm then theres probably nothing wrong. Also before you set off set the dash diagnostic to check what temp the engine is reaching. should be somewhere in the upper 80s or above if your lucky. If the best you get is mid 70s then you probably need a new thermostat.
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11th February 2011, 11:55 | #5 |
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Those short journeys do kill fuel economy. My wife's 1.2 Ibiza normally does 46-49 MPG on my commute of a-roads and motorway, when she was working just over three miles away, that dropped to around 32-33MPG.
Still 22MPG does seem low. |
11th February 2011, 12:20 | #6 | |
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Quote:
Such short jouneys are not good for the engine and it needs a good thrashing once a week. Ron
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11th February 2011, 17:11 | #7 |
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Thanks Ron.
Its really frustrating, as I have purchased a Synergy 2, and a Pierburg Maf from your website. I had not given it a thought about informing the insurance company, and now I am worried how it will affect my premium if I do tell them. So in the meantime Synergy etc. remains in the jiffy bag. Nigel. |
11th February 2011, 19:09 | #8 |
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Didnt change my maff but I did fit a synergy Admiral charged me an extra £26 for the year which I thought was ok. Give them a ring you may be suprised if its a bad suprise then shop around and when the time comes renew elsewhere. I would try the synergy with the orional Maf first.
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13th February 2011, 07:47 | #9 | |
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sorry im new to 75s does my 02 2.0 cdti connie have this diagnostic thingy ? and how do i access it ? |
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13th February 2011, 17:13 | #10 | |
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Quote:
Nigel. |
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