Hi guys, i haf full tanked my impreza, and it returned 96 miles, is this noirmal for a subaru, i have a full decat axhaust system, chiped ecu, hks induction kit and thats it.

could it be my fuel pump need changing, as when i put my foot down, it feels like it hold back for 2 secs and then spits the fuel like a fireball and den Woooosh of i go, and also i then smell fuel, could it be my fuel pump playing up, and could this be the reson why im geting such terrible miles outa full tank of v power.

Thanks guys

 

Lambda sensor working?
Any fault codes?
Any fuel leaks?

 

That is tooo much even if it was running super rich mate, you got to have a fuel leak or your gauge is reading wrong surly?

 

I've just got 250miles from 50quids worth of v power. I dont think its your fuel pump, can you smell petrol at any other time than when you put your foot down??

 

lambda

 

my sti does about 70 miles to 25 pound of v power with 335bhp

 

my bugeye did 90 miles to £25 no remap but had full de-cat and walbro pump and kn filter. running unleaded

and on the same note my first bugeye did about the same with similar mods but no walbro

 

Definatly something up there. Even hammering the nuts of my STI which has PPP will see it return 225 miles to a tank of Tesco 99.

Best to date was 316 miles before the petrol light came on

 

Thats not normal, i average 280-300 miles out of a tank. best i've had was 34mpg on a motorway run.

 

what year / model ?

 

Hi Mate,

I would say that's not normal. But...

When I bought by Scooby I managed to get 90 out of a full tank, but I literally caned it everywhere I went on purpose to see how much I could scare myself and that was with no mods.

After that, wooow I thought, perhaps I should have stayed with my 4 litre Jag for environmental / economy reasons

Since then I calmed it down, quickly, I get around 225 out of my WRX around town in lots of traffic jams and 250+ on a run.

So me thinks you have problems with your car.

Hopefully someone else's advice will help you sort it.

Nick.

 

does depend heavily how you drive it.. but that does seem low mpg

Simon

 

hi guys, when garage was fiting decat, they cut of the lambda sensor saying that it dont need it, car was driving great, reali responsive, but realy heavy on fuel, even when driving nicely, its very heavy on fuel, and now, car has just died out, its become a big fat slug , any ideas what it could be, and i only smell fuel when i hammer it

 

its a 95 wagon wrx

 

Details! you definitely need a primary lambda sensor, not necessarily a secondary or heat sensor, but you wouldn't normally just lop it off!
Did they use a Samurai sword?
Take it to Subaru man, and hand over keys sharpish, you may be bore washing like mad, and Greenpeace will be on your tail.

 

Lol

 

my original cat only had 1 sensor, and its was at the bottom of the cat, he choped it of, was hard to cut of, is that the lambda sensor, do i need to replace it,where i live no1 noz about subarus,

 

the sensor you are talking about is the cat on fire sensor, which is not needed when you fit a decat exhaust, but as others have said you obviously have a problem, get it to a Subaru specialist, where about in Lancashire are you, as there are scoobyteknix up that way

 

if i were you i would be getting one fitted as they play apart in helping controle your fuel injection system when mine was faulty my car was running rich & mpg was down quite significantly to normal but not near as bad as yours maybe you should take your plugs out & have a look to see what colour the tips are this should indicate how your engine is running!

my car is a my00 running around 340bhp & now it still returns easily 300 miles to a tank of v-power

 

just had a mechanic to have a quick look at it, my lamda sensor is still on the car, its was the cat on fire sensor that has been choped of, iv had new plugs fitted, cars going to go into a technician for him to have a look at it and check everything out. he has been recomended

 

ive had 330 miles for £50 out of my 06 sti mapped to 340 bhp by JGM i normaly get around 270 ish.

 

if you are anywhere near darwen i would recommend CAMS subaru specialist (01254704765)

 

still might be your lambda sensor it might be goosed ,i just changed mine as i was getting terrible mpg now its back to normal

i have a scangauge to check for error codes... great piece of kit

 

Something definatley not right there,96 miles on 60 ltrs of fuel,never used that much on a track day and car was hitting 8-10 mpg then.

 

I have a freshly built engine, new Lambda, coilpacks etc and get around 250m on the combined cycle on 50 litres, or 5m per litre.

So really, you're miles off - even taking into account an aged/tired engine!

I'd first check your fuel system over thoroughly: fuel lines/filter, injector seals/rails, FPR, etc. And check lambda is cycling back and forth between 0 to 1V...

 

Don't think mine has been that bad even on a track day!

 

Bought my car last week.
Filled £60 V-power on Thursday Night
Lasted till Sat Morning and had only done 110 Miles.
LOL

Neel

 

If I'm reading this right you only half filled your tank, I wouldent say your too far off the mark depending how heavy you have been with your right foot

 

I think it just badly written mate. Works out at 7.27 mpg

 

Ahhhh, half instead of have, right?

That would explain it it bit better. But that's still 'only' under 200m a tank, which is a little off... UNLESS that's lots of hooning involved...???

FTR, it works out at c.17.5mpg, so yeah, a semi-hooning mpg figure lol.

But in future - and unless that's genuine typo - could you pleeeeease make an attempt at writing the word correct first time - as then we wouldn't have wasted 30 posts to date...