JC

small turbo ezzy coz
the car was running fine,then the fuel tank sucked in and broke the fuel pump so the car cut out
i fixed the fuel pump and drove the car less than 2 miles and the tank has
sucked up and made a dint in the fuel tank it seems to be presurizing
i have checked the tank breathers and there fine i blew the breather out and water came from the passenger inner wing
ther is a charchoal trap in the inner wing but it now seems to breath alright now
has this happened before just wondering if there is a cure save me scratching my head
i have never come across this before
thanks jc

vroooom ptssssh

So the tank tried to impload? Sounds like one of the breathers was deffo blocked and by fiddling with/blowin through has unblocked them. the one with water in sounds weird tho. what about the fuel cap, are these not meant to breath with a *tiny* lil hole on em somewhere that lets it suck in air? does it hiss usually when u take the cap off?

dave cos4x4

iTrader: (5)

mines o.k John.

Spluttered a bit, but its getting too much fuel now,so it must be o.k.

Big thanks to J.C and Seveneights( Paul) for helping me fit the uprated fuel pump today,thanks mate.



Dave.

The Youth.

iTrader: (1)

May not be related but is it only when the tank is nearly empty?
This happened with my old saph cos and it was caused by the breather getting squashed between the boot floor and the top of the tank( It had moved from it's correct position somehow) when inspecting it, It looked ok as the pipe blew through but when refitted crushed again, replacing the pipe(on a saph the breather pipe is very small in diameter) and rerouting worked.
might not be it but worth a look.
steve

markk

iTrader: (2)

try it with the fuel filler cap off for a while this would eliminate any breather faults .

im not sure but does teh small turbo run active charcoal canister control ??

dave cos4x4

iTrader: (5)

think its in the pass inner wing.

markk

iTrader: (2)

but it is active , i.e doe the eeciv run the breather control ,


ok , a little info on active charcoal control ,

basically , as part of the europeon emissions directive ( not sure the version number to hand) fuel tanks were not allowed to vent to atmosphere, so manufacturers had to design a system to remove the tank pressure with out external venting.
withtin the combustion process teh fuel vapour can be burnt but only at certain times of the process .
excuse me for any mistakes atm - ive had a few and am still having a few

anyway, so they had to be able to burn this vapour via the combustion process, but as i said only at certain times of the burn , and also in metered quantity so as not to alter the stoichiometric value status of the engine under all given loads.

so , incomes the charcoal canister, fuel vapour forced through charcoal becomes neutralised via a chemical reaction , but if we forced the vapour contantly through the charcoal the effects would soon be worn off as the charcoal breaks down over a period of time, so we burn as much vapour as we can , on the canister is fitted a solenoid valve which is duty cycled according to ecu information i.e load , afr, etc at idle very little can be bunr, but at cruise a considerable amount can be used to remove fuel tank pressure.

looks like im now at my point so IF ( and i now hope its got ACC) and its not functioning correctly , as you draw out the fuel from the tank via the pump you will create a vaccum thus sucking the tank flat ( or as much as it can draw).

i think ive lost the plot now so im going to go !!!

prob wont help at all !!!

JC

up

Stu @ M Developments

iTrader: (12)

Marks just told you what is/was wrong

1) The blocked charcoal cannister let the pump suck teh tank in.

2) The Ecu controlled solenoid/wiring/piping is faulty and the tank isnt being vented properly.