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Fuel Filter change and drastic fuel consumption

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I can not see anything leaking from anywhere. air filter looks pretty new, oil looks new too.

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  • Simple, the test has very little to do with real world usage.   Why do you think changing the fuel pump or fuel pressure control valve will increase the fuel efficiency?   Rather t

  • I would be tempted to Brim my tank, drive 50 miles or so having zeroed my mileometer and Maxidot then brim again and see the actual miles per gallon,  or miles per litre used.

  • It wouldn't. I suspect it's the placebo effect.   Sometimes the flow and return pipes can loosen on the lid of the fuel filter housing, resulting in a leak, but this would be easy to see.

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Have you had the chance to brim the tank, reset the trip meter, run it until the fuel light is on, fill it back up to full, note the miles covered and number of litres of fuel used, and manually calculated your fuel economy?

  • Author
59 minutes ago, silver1011 said:

Have you had the chance to brim the tank, reset the trip meter, run it until the fuel light is on, fill it back up to full, note the miles covered and number of litres of fuel used, and manually calculated your fuel economy?

I didnt do it yet. tomorrow taking it for major servicing and MOT. let me sort it out then I'll calculate properly about the fuel consumption. Just wondering should i tell the SKODA that i changed the fuel filter myself and hence its giving me worse fuesl mpg.

  • Author

Just to update my post. I had the car major servicing from Skoda..as i was driving back home i saw little improvement of mpg and when this morning i started the car, infoteinment started from 27mpg not 17mpg. So i think in terms of fuel consumption, its back to normal.

 

Lesson learnt: Do not change Fuel Filter if you do not know how to prime. Its not straight swap,needs prime during swapping. 

Edited by automass

I'm guessing that all the readings are coming from ECU & its just reset itself.  As you never brimmed we'll never know.

All priming does is eliminate (or reduce) the chances of air getting into the system, as well as ensuring the fuel pump isn't run dry.

 

If when removing the old fuel filter you are really slow, and then rest the filter over the fuel filter housing to ensure all the fuel drains back into the housing, or if you have a spare can of fuel, top it back up after refitting the new filter, then priming shouldn't be needed.

 

On the older PD engines, cycling the ignition used to activate the fuel pump, so turning on and off the ignition a few times before starting the engine was enough. It seems to have changed on the CR diesel engines.

 

I must have changed the fuel filter on my CR engined Superb a half dozen times without VCDS and its been fine. Just take things slow and steady :D

  • Author

Honestly guys, whats wrong with my fricking car! I did everything i could do to improve the mpg. But it is as it is. 

I did brim it with shell vpower and also added lucas total care fuel additive to clean up the injectors and so, but as i am driving this evening since 6hours..i can see it consuming fuel like horse..

What else i could do..i have checked ash volume in dpf which is 34grams..i am thinking about fuel pump and fuel pressure  control relief vulve..if something was wrong with them would it not through any light to the dash or would it not show in diagnose. Help needed guys..please!!!

Have you brimmed the tank and worked out actual MPG yet?

  • Author

Yea, 41mpg to be precise in 30 and 40miles road around the city.

By the way, is it not 4.54L= 1gallon?

Edited by automass

1 hour ago, automass said:

Yea, 41mpg to be precise in 30 and 40miles road around the city.

By the way, is it not 4.54L= 1gallon?

 

Yes 4.54l is a UK gallon. US gallon is 3.78l

Which then begs the question whether the display unit measures chosen are US gallons and not the desired Imperial version? Hence the apparent bad consumption?

Edited by Gerrycan

17 hours ago, automass said:

Honestly guys, whats wrong with my fricking car! I did everything i could do to improve the mpg. But it is as it is. 

I did brim it with shell vpower and also added lucas total care fuel additive to clean up the injectors and so, but as i am driving this evening since 6hours..i can see it consuming fuel like horse..

What else i could do..i have checked ash volume in dpf which is 34grams..i am thinking about fuel pump and fuel pressure  control relief vulve..if something was wrong with them would it not through any light to the dash or would it not show in diagnose. Help needed guys..please!!!

 

Is your gauge actually moving down quicker than it was before? Or are you basing it entirely on what the screen is telling you?

 

We get a lot of people come into my work complaining about a fuel leak, only to find they've been sat in traffic for the best part of an hour. MPG drops to 0 when your idling, and slowly drags the average down to a figure far below what it actually is. 

 

Changing your fuel filter cant affect MPG unless theres a leak, or your old one was choked solid. It literally does nothing that could affect it. 

  • Author
5 hours ago, Gerrycan said:

 

I am not paying any attention to the infoteinment..i brimed the tank and when it was 154miles in trip computer, i refilled it. Total 17.78liters it took to be refilled.

What is wrong with 39.5 mpg near enough?

Where are you driving, how far each time from a cold start?

Edited by Skoffski

  • Author

I normally got 10miles per Liter with my same car 63plate and same driving style..but with this car i will be having 100miles less than that.. Guys, lets come to the point..do you ghink i need to change fuel pump or fuel pressure control valve?  

Is it a 2016 so Euro 6 1.6TDI that you are talking about now, and comparing to a 2013 Euro 5 1.6TDI?

10 miles per liter was only 45.4 MPG or so.

Not very good really IMO.  But not bad if that was an average with town driving and short trips.

 

The last one (euro 5 1.6 TDI) had a Defeat Device and Skoda were cheating and those cars underwent a Voluntary Recall.

Your Euro 6 TDI is not the same as you had before.

 

I think if you think the car is wrong you get someone to check and see what is wrong, or just see what you get as fuel consumption on a proper run out of town.

 

11 (gallons) x 6 mpg less would be 66 miles less range / miles driven for the same amount of fuel, not 100 miles.

Edited by Skoffski

  • Author

Both of these cars official consimptions are 74.3mpg. If euro 6 is to consume more, then official figure shou have been different.

Well, i'll be able to let you know how many miles i can get from a full tank. I had it major serviced from Skoda and they said there is nothing wrong with the car. But i am not convinced.

 

What car do you drive, what is your consumption? I drive very efficiently and let the car roll in neutral as much as possible. But nothing helping to get the desired mpg.

Not combined figures, and those were the old EU test on a rolling road in a temperature controlled building.

Nothing to do with you taking a car on a road with people and stuff in it.

Check the new WLTP figures for a 1.6TDI with SCR (AdBlue) 

 

I have a SEAT Alhambra 2.0 TDI SCR DSG that does 10 miles to a liter easily with 4 or 5 people in so doing 630 miles for 63 litres, and it can do 730 miles or so at NSL's with using Coasting Function. That is not moving the shifter from 'D', just toe off the accelerator So better than the EU Figures.

Does a pathetic 25 mpg or less doing lots of short  few mile trips with cold starts, regens lots, and blocks the DPF.

Edited by Skoffski

  • Author

Guys,why dont you understand! I am comparing this car with old one..i know how they test about the consumption..but my point is both car has tested for same consumption ..so why this one is worse then other one with even shell vpower fuel? 

Shell V-Power Diesel might have more detergents but no higher Cetane so just cleaning your engine maybe, not worth the 15 pence a liter extra in my opinion.

Is everything actually the same, tyres, car weight, gearing, because Skoda cheated EU testing, Oil in the Diesel, over inflated tyres etc.

Just not as much as VW, SEAT and Audi did.

 

Really impossible that the Euro 6 is the same as a Euro 5 with Defeat device.  

21 minutes ago, automass said:

Guys,why dont you understand! I am comparing this car with old one..i know how they test about the consumption..but my point is both car has tested for same consumption ..so why this one is worse then other one with even shell vpower fuel? 

 

Simple, the test has very little to do with real world usage.

 

Why do you think changing the fuel pump or fuel pressure control valve will increase the fuel efficiency?

 

Rather than panicking, wait until you've used two or three tanks of fuel to get a proper idea of how much fuel your car is actually using. In the mean time, check your tyre pressures, make a note of what tyres are fitted and check none of the brakes are binding.

  • Author

Guys,

I am sure something somewhere is wrong. yesterday I made a round trip London-oxford-London around (135miles). I was driving at 75mph at max and guess what infotainment was showing 48mpg and fuel gauge was going down 20miles per bar. well I know you will be saying that this is not accurate just do the accurate reading. I had it done. 404 miles (including this 185miles motorways driving, rest of them city drive where speed limit ranges 20-50miles). I don't think anybody else with similar car will be having this kind of worse mpg in motorway.

 

My concern is, when I bought it almost a month ago it was giving me same MPG as my previous car which was 66mpg in the motorway and 48mpg in the city driving. but since I have fiddled with the fuel filter I was getting worse mpg. there was no modification. only thing I did was changing the fuel filter. I got the car major serviced from skoda and they said they changed the fuel filter. But I have big suspicion of it.

 

well guys, my point is I was getting the MPG that I expected from this car at the beginning but now it has gone down for some reason. I have filled the tank more than 3 times so far. the car is about 91k on the clock.

It is not accurate.  What was the Miles per gallon or miles per litre?

Can you not just say how much diesel used for 135 miles. or 404 miles driven because no idea what the MPG actually is that you get.

Edited by Skoffski

  • Author
46 minutes ago, automass said:

I had it done. 404 miles (including this 185miles motorways driving, rest of them city drive where speed limit ranges 20-50miles).

 

oh sorry, i didnt complete the sentence. it should be

 

I had it done. 404 miles (including this 185miles motorways driving, rest of them city drive where speed limit ranges 20-50miles) by 37.3L fuel.

Edited by automass

49.26 MPG then. Sounds good.

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