Club 80-90 Forums

i have recently bought a t25 1.9 watercooled petrol camper and everything was running fine untill about a month ago
now when i slow to go round a corner then accelarate out of the corner it starts loosing power can nearly stall then picks back up again.
it some times does it when pulling away and is worse when its wet (which seems to be all the time at moment)or when started for the first time
the dizzy and rotor arm look new and i have replaced the ht leads (this has made no change)

any ideas ???

Hi there, You say it only happens when its wet, is water getting in your fuel system ? check the little rubber sleeve between the petrol filler cap and the filler pipe as these perish and when water is flicked up off the drivers wheel it can get into the tank, i replaced mine back in the summer cost about a tenner delivered from just campers part number j11024, these vehicles also suffer with the tops of the petrol tanks rusting which is also a route for water to get into the fuel system, its hard to see on top of the tank so you'll need a little fibre optic camers which any half decent garage will have.

water in the tank?

pull off the fuel hose at the filter.. drain the fuel into a jar.. water sinks to bottom.
or pull off the fuel outlet from the pump to the carb.. start the engine and let it pump fuel into a container.

water in the fuel clogs the filter and rusts the transfer pump spring which in turn clogs the jet, and causes hesitation when accelerating.

the water ingresses via the perished breathers and the filler neck

Check the tinware's there round the lower engine bay .... Onkel VW made the water spray onto the coil from the back wheel if the nearside tinware's missing.

Fuel filter and tank are also common issues.

Ian.

I have found perished pipes to the plastic bottles/containers/tanks at the top of both the front arches
I have pulled a pipe off and they do smell of petrol so i think this is proberly my problem many thanks to above people as i thought it was electrical

can anyone tell me what these bottles/containers/tanks are used for thanks

Also, before you start to perform major surgery.. replace the £2 inline fuel filter if there is one already fitted.. they work fine, then all of a sudden go and cause very poor running and stalling... could save you some big £££..

nickynewnew wrote:I have found perished pipes to the plastic bottles

can anyone tell me what these bottles/containers/tanks are used for thanks

these perished breathers I suggested, are the ones you have discovered..
they are there to allow fuel to move around the odd shaped tank, especially when it's over 3/4 full.

I have disconnected mine and sealed them up
so no more issue with water.

However I rarely use petrol, due to a gas conversion. Never had the tank over 1/2 full since
Replacing the hoses is tricky.. but easier with the tank out

Hi Nicky
We had a similar problem with our petrol 1.9l T25 when we first used it in the rain. The fuel tank is shaped with two humps so that the pipes, cables etc. can run over the centre of the fuel tank and along the length of the van. When the tank is near full these humps would trap air (or petrol vapour) and not be able to store fuel. This is overcome by connecting them to plastic expansion containers in the wheel arches, into which the vapour is pushed by the fuel. From what I remember, it was a lot easier to replace the pipes by removing the fuel tank. I decided to remove it anyway so that I could dry it out internally, check its general conditon and paint it's exterior. I also replaced the fuel filter and other flexible fuel lines in the system. (I believe this is explained in the Wiki). Speaking of perished rubber, you would be wise to check the flexible brake pipes which connect the brake lines to the wheels - during the same time I discovered that two had worrying bulges in them and I definately wasn't going any further until I'd had them replaced. Still, it has really been worthwhile and I'm sure you'll get enormous pleasure from your T25.

Nic