Fuel evaporating? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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MattyB

Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline

16th Mar 03 at 13:36

on my 1.2 8v i have a prob. When i leave the car over night, it seems i lose petrol? anything upto an indicated 2/3 litres on the guage!

I realise this is very wrong and thought it was just me, but its true. Each morning when i restart my car i have less fuel. I have checked underneath and the ground on which the car stands but nothing! no smell, no wet patches, nothing.

Thing is, at the rear of my engine, i have a grey valve which is connected to a pipe from the petrol tank, and is used for fuel tank pressurisation. The valve is meant to be sealed, and linked to the inlet manifold, but ever since i've had the car, this valve has been broken, so i'm wondering, is it possible that fuel is evaporating in the tank, then moving up the pressure release pipe and out???

If i plug the valve, will it help? or is a build up of pressure in my tank a bad thing!!?? lol seems that way!

cheers for any input u can give!

Matt

Kris TD

Member

Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline

16th Mar 03 at 13:39

thats a lot of fuel to evaporate over night.

Geezer

Member

Registered: 3rd Mar 03
User status: Offline

16th Mar 03 at 13:48

maybe, u have to go up a hill to get your your house and then u park on a flat drive, and hence this would seem like your losing fuel when your not.

MattyB

Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline

16th Mar 03 at 14:10

cheers for that lads, but nah, basically i have a flat driveway!! Before i turn the ignition off for the nite, i keep it idling for a few mins to let the guage settle. Then i do the same in the morn, and i have found there is definately a drop!!

I've checked in haynes, and its the "fuel evaporation control valve" found at the back of the engine bay. It says the purpose is to store fuel vapour in the charcoal canister when the car is parked up, then release it into the inlet manifold when u next start the car up.

I'm thinking that my valve is leaking the vapour straight into the engine bay, even whilst parked, and with no vacuum, loads more than it should, is escaping.

Any1 got any ideas?

Matt

troublesome

Member

Registered: 25th Dec 02
Location: Birmingham Drives : Corsa B 1.2
User status: Offline

16th Mar 03 at 14:40

ive got 1.2 8v my fuel is is gettin eaten away too, and my car cuts out with ecu light on... ead this fault today do u think this is linked to fuel...

33 Manifold Absolute Pressure (MAP) sensor High voltage

[Edited on 16-03-2003 by troublesome]

MattyB

Member

Registered: 13th Nov 01
Location: 118.5bhp :D
User status: Offline

16th Mar 03 at 14:51

unsure mate! my 1.2 8v is only doin bout 25mpg round town.....hits my pocket hard! I really need to sort it out

Matt

AustinRacer

Member

Registered: 25th Dec 02
Location: Bulwell Nottingham
User status: Offline

16th Mar 03 at 14:54

ive got a 1.2. 8v n my feul goes like mad too i thought it was cos of my air box being drilled
Helen

dig dave2811

Member

Registered: 6th Jan 03
Location: newport sout wales WCM
User status: Offline

16th Mar 03 at 14:55

my 1.2 8 valve only seems to be doing about 200 miles on a full tank. thats with no engin mods and small journeys like round town etc.
is making me skint

AustinRacer

Member

Registered: 25th Dec 02
Location: Bulwell Nottingham
User status: Offline

16th Mar 03 at 14:58

i no the feeling dave

dig dave2811

Member

Registered: 6th Jan 03
Location: newport sout wales WCM
User status: Offline

16th Mar 03 at 15:06

quote:
Originally posted by MattyB
on my 1.2 8v i have a prob. When i leave the car over night, it seems i lose petrol? anything upto an indicated 2/3 litres on the guage!

Matt

maby someone is using a hosepipe and coming round and emptying your fule