poor m.p.g.

[cupra-rich]

what the main cause's of poor mpg? [ beside's a heavy right foot] only getting 450miles to the tank been told this is'nt that good for remap'd 150 tdi,got the same mpg before remap too?
thanks
rich

 

[oldman]

fuel filter, oil & oil filter changes may help
i was getting over that with a fully clogged egr, so could be worth removing and cleaning - fiddly but worth it

any codes if do vag-com

 

[cupra-rich]

no codes on vag-com, oil & filter change every 8k, green panel filter washed re oiled at the same time. egr valve not clogged up at all pretty clean really.just changed fuel filter yesterday not been done since i've had the car 18 months, hopefully this will help. any more idea's would be appricated.

 

[rallynut]

that mileage per tank seems about right for mixed driving

 

[cupra-rich]

that mileage per tank seems about right for mixed driving

really been told by mates who have remap'd 150 gt tdi golfs there getting xtra 100 miles to the tank.

 

[jaz205gti]

use some millers diesel power
it cleanes injectors improves mpg and performance

worked wonders on my 130 tdi

 

[thegooner]

MAF ?
boost leak

450 seems pretty good, 600 is driving like a saint pretty much

 

[cupra-rich]

have used millers since i've had the car, 18 months. have looked for leak but can't find any. how would i check to see if it is the MAF

 

[cocadave]

my average per tank is around 490 - 510 miles, easily 350 of them is on M-way where trip computer tells me i'm getting above 50mpg most of the time, i think what lets us down is probably the other 150 miles on boost around A-roads

If you want to feel the power, you got to pay for it with fuel

 

[thegooner]

have used millers since i've had the car, 18 months. have looked for leak but can't find any. how would i check to see if it is the MAF

you can clean them with carb cleaner but it a case of you can/cant do it. i
if it is knackered disconnecting the MAF . if it runs better than its a good indication that its buggered, if it runs pretty much the same or worse then its good

 

[cupra-rich]

my average per tank is around 490 - 510 miles, easily 350 of them is on M-way where trip computer tells me i'm getting above 50mpg most of the time, i think what lets us down is probably the other 150 miles on boost around A-roads

If you want to feel the power, you got to pay for it with fuel

yeah gotta agree with ya there mate it's all fun love the torque low down on these.not really worried about mpg, just mates seem to get more than me,thought i might have a underlying fault or issue. will see if new fuel filter makes a differance this week.

 

[Swig]

I think most people say not to use carb cleaner on MAFs. Use IPA instead

http://www.maplin.co.uk/Module.aspx?ModuleNo=28994&C=SO&U=strat15

 

[andycupra]

before we give any further advice you should give us some info on your drving habits.
EG, how ofted do you drive and how far? (is work 3 miles away or 30?)
type of roads used and typical speed. how much traffic?
any short journeys mixed in there.?

would you say you are a slow, average, nippy or fast driver?

be honest.

 

[cupra-rich]

my average per tank is around 490 - 510 miles, easily 350 of them is on M-way where trip computer tells me i'm getting above 50mpg most of the time, i think what lets us down is probably the other 150 miles on boost around A-roads

If you want to feel the power, you got to pay for it with fuel

would agree with the above post, work 16miles away of which 11 on motorway 70mph rest dual carridgeway with islands at 40mph, do like to be first from lights but don't speed on motorway,so would say i'm a nippy driver,maybe just need to stay off boost abit more

 

[rallynut]

you should be seeing around 48 mpg average on the comp with those types of road driving,as its not that far any thing over say 20 miles of m.way the average on mine seems to go up quite a bit after if im doing 65-70

 

[ChrisGTL]

Do some MAF logs?

You said you oil your panel filter, this can be quite bad on the MAF as the sensor gets a coating of oil on it so it can't read the air volume correctly.

I'd do some MAF and MAP logs, do you have the green or black temperature sensor? The black ones are a common fault on the VAG's - this can contribute to poor MPG too.

Engine oil? What do you use?

Any brake pads sticking?

Tyre pressures at 33psi when cold?

No dead bodies hidden in your boot?

 

[cupra-rich]

bit of an update, taken dead bodies out the boot, [forgot about them] changed fuel filter, change maf, no pads sticking, no boost leaks as far as i can see,tyre psi is 33 checked weekly. not sure where the temp sender is so don't know if green or black. but still getting same mpg

 

[Deleted member 28319]

I think most people say not to use carb cleaner on MAFs. Use IPA instead

http://www.maplin.co.uk/Module.aspx?ModuleNo=28994&C=SO&U=strat15

When you refer to cleaning the maf, do you mean just cleaning the plug in connector or do you take the unit apart.

 

[Swig]

Cleaning the actual MAF. People also do clean the contacts are use dielectric grease on them to keep the contact good. There's some instructions either in a thread on here or linked to from a thread on here.

I didn't do it in the end. I was all set to - IPA at the ready - and then found my MAF was clearly brand new so I didn't waste my time.

 

[Deleted member 28319]

Cleaning the actual MAF. People also do clean the contacts are use dielectric grease on them to keep the contact good. There's some instructions either in a thread on here or linked to from a thread on here.

I didn't do it in the end. I was all set to - IPA at the ready - and then found my MAF was clearly brand new so I didn't waste my time.

Thanks for that. I cleaned the contacts about 6 months back with dia-electric grease so will look for some instructions on MAF cleaning, possibly in faq's. Also got the car in for service today so that may improve things.