Author Topic: MPG problems for the past year  (Read 10123 times)

Offline asif

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Re: MPG problems for the past year
« Reply #40 on: 15 November 2010, 09:16 »
Will do :afro:
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Offline asif

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Re: MPG problems for the past year
« Reply #41 on: 16 November 2010, 23:45 »
Thought the MPG improved a tiny bit but I was wrong after monitoring it for the past few days, it's still kinda 32 to 35mpg or a tiny touch over if i'm lucky.

I called GSF yesterday as I thought if my MAF that I bought from them under a year ago is buggered then maybe it's covered, so called and they advised they could send it off for testing which is ok cuz seems like it's deffo fooked by logging done by Toph but only problem is in the mean time i'd be MAF less:( so in a bit of a tricky situation.

This sh*tty heap of metal is proper cheesing me off :( why can't it just run right and give me good miles.

I filled up today done 30 miles and the first section on the fuel guage os already gone, that bit normally goes well after 60 miles atleast :( feeling like just flogging the bloody thing
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Offline Agreeable Slick

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Re: MPG problems for the past year
« Reply #42 on: 17 November 2010, 07:58 »
Just to tie you over, you could request one from 24/7spares.co.uk?

Submit a request for a part, and the various breakers/dealers on there will email you with quotes for a replacement. Postage is usually pretty prompt once you agree on a price, and could get you out of the problem whilst yours is off being tested?

Offline asif

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Re: MPG problems for the past year
« Reply #43 on: 17 November 2010, 21:39 »
Might try them, i'm just really worried that like my intercooler i'll swap it and i'll still have the problem knowing my luck :(
I changed the intercooler and my problems got worse and the car kinda drives like sh*te which is beyond me, as the intercooler is brand new, along with the MAP sensor.
It's beyond me as to why i'm in a worse situation once i've changed old parts for brand new parts? Can anyone explain why this may have caused me so much problems for changing to a brand new intercooler? As I was told by my mech that the intercooler was leaking so I had a boost leak which was causing me most of my MPG issues but now it's fixed the car is the worst it's ever been.

Even if the MAF was fooked before the new intercooler, then why the hell would my car get the worst it's ever been after changing the intercooler.

It's like for example; your spark plugs were fooked causing you running problems then you go change a tyre for a brand new one and suddenly straight after your car runs even worse? I just don't understand the boody car and my problems they make no sense what so ever. I'm sure you guys can understand why i'm so dubious about spending more money and getting the MAF changed for a new one cuz I may end up in a worse situation knowing my luck.

I'll check out that 24/7 parts thanks for the idea, much appreciated.

Can anyone shed any light on this problem i'm having as it's beyond me what's happened in the past year and £400+
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Offline richandhazel

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Re: MPG problems for the past year
« Reply #44 on: 17 November 2010, 22:50 »
Bit surprised about the intercooler diagnosis.......thought they were quiet reliable and, if they do fail, usually fail in an obvious way :undecided:

If Chris has done the tests on the MAF and it has failed then there is your answer and you shouldn't have to wait for their own tests......if necessary bluff it and tell them you have already had it tested by Chris, VW, whoever and it is definitely at fault, demand a replacement under the 'sales of goods act'.

Offline topher

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Re: MPG problems for the past year
« Reply #45 on: 17 November 2010, 23:19 »
fixing one problem will often highlight another, it's down to the way these ecus handle running issues.. compensating here and there. the maf didn't show any signs of issues until after the ic was fixed, which is why i want to have another look at the car before replacing it.

Offline Agreeable Slick

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Re: MPG problems for the past year
« Reply #46 on: 18 November 2010, 08:12 »
Only reason I can think of that the car would now be running worse economy wise is that since the boost leak has been fixed the ecu must think that it is now running super lean, so dumping more fuel in to compensate.

Offline asif

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Re: MPG problems for the past year
« Reply #47 on: 18 November 2010, 15:48 »
Cheers lads and cheers Toph, i'll drop you a PM so you can have a look at it.

GSF seem quite firm about having to test it before they'd replace it :(
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Offline asif

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Re: MPG problems for the past year
« Reply #48 on: 20 November 2010, 16:59 »
Right visited Toph again to try a working MAP on the car as before he replaced it it was reading high on idle, it was reading at 500 whatever it is for the MAF which was way too high on idle, so tried the working one and the same issue high reading of 500.

So not got a clue what's causing such high readings on the MAF

So for now, we've removed the map so the car is de-mapped and back to factory monitor to see what difference it makes if any.

Also the car's idle speed has been set to the correct amount from VAGCOM.

Gonna monitor the MPG for the next week and take it from there, the MPG seems a tiny bit better on the drive back but that maybe because I reset the onboard comp thingy when I was there and it is a fairly eco drive back anyway.
So will keep you guys posted on how the car behaves now.

Not got a clue what is casuing the MPG toph said it may be and electrical fault or worst case scenario the ECU which at the minute doesn't look likely but never say never and all that.
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Offline asif

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Re: MPG problems for the past year
« Reply #49 on: 30 November 2010, 23:31 »
 So since removing the MAP the MPG is still as poor as ever  :cry:

Yesterday was driving on the motorway and bang hit limp mode 3 times, all 3 times I pulled over and switiched the car off and back on again and all is ok until I give it some it hit limp straight away  :cry: in the end I just limped my arrse back home, inner city no limp cuz I didn't give it some once I got back as it'll just pee me off  :cry:
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