hi

 

I´m still trying to sort out the problem I’m having with the petrol tank.

 

I know all about the petrol tank causing a slight vacuum through pumping the fuel and the air not being replaced entirely until the vacuum pressure opens the valve on the petrol cap to allow air in but mine is doing the opposite, when I open the fuel cap air isn´t being sucked in it’s actually being blown out, so much so that if I jam the small valve on the petrol cap open it starts to spit petrol out. How can the petrol tank be under pressure like that? :confused: I have to open the petrol cap every 20-30 km to release the pressure otherwise the pump starts to fail.

 

Any ideas would be greatly appreciated.

 

Maz

get a good make one like this

http://www.demon-tweeks.co.uk/motorsport/fuel-tank-vent-valves/mocal-fuel-tank-pressure-relief-valve

make sure you get a 2 way one not a 1 one way

Cheers thanks for your help.

and fit it the rite way round it will say in it or on the box tank side or something like that have a look of your pipe size before you order one

also makes sure the pipe that runs to the carbon canister isnt blocked, the valve could be ok and the pipes blocked from the valve to the canister at some point