Transporter - Engine cutting out problem

[rgh]

Hi, I have a 94 Transporter 2 litre. Runs on petrol or gas. (petrol start).
The problem is that it simply cuts out while driving, just as if the ignition was turned off. Sometimes it just does it for a half second and others it stops and wont restart for over and hour.
On these occasions, if you try to start it it will "kerchugger" and keep going like an old morry minor with the idle speed set just above stalling, but the slightest extra breath of intake air will kill it. It might do this for some time but eventually it wont do anything.
Happens on gas or petrol, so I am assuming it is not an injector problem,
Now, I have not yet checked if there is full spark when it happens. (there must be some, since it will "kerchugger."
My need is to know what is most likely here - the coil unit, the distributor (hall sensor) and is there a crank position sensor on this model?
Is the EFI computer still a suspect? Does it control the ignition as well?
Note - no it is not a relay or fuel problem. All checked.
The fault is instantaneous and can happen within two seconds or two hours of driving.
Thanks in advance for any aid. I live in the hill of northern Tasmania and have had to be towed home twice now.

[Sunny43.5]

This problem has been raised before there is a relay in the fuse box number 30 if I am right its a known fault , mine had the same issue it would just cut out without reason any time of day etc . I would then have to sit and wait for a while and it would then start as normal [admits here it stuck me in a line of traffic but I was able to just get it off the road by turning the engine over in gear a slow crawl but it got me clear ] The dealers could not find the fault but a parts guy overheard me telling the service people about the problem and he interrupted us to suggest I change this relay and it never happened again . Now I will admit here mine would not start at all when it played up but yours will start so there may be another issue at play Here is a link to someone else with the same sort of problem it may also help http://www.vwwatercooled.com/forums/...+relay+problem and this one http://www.vwwatercooled.com/forums/...+relay+problem

[rgh]

Problem with this solution is that this is a gas/petrol conversion which means relay 30 no longer controls the ECU (bypassed by the gas/petrol C/o relays). You can pull relay 30 out and the car will still start and run, merely a little rough.
Currently looking at the possibility that the overflow tank is leaking and dripping water onto the distributor. Remote chance of problem, but it could have been getting into the Hall sensor wiring. Don't know yet. Could still be something else, but...
Thanks for the reply and ideas though... still unsure if this motor has a crank sensor. Cant find one.

[Sunny43.5]

IF you have a look through the two links there is more information .

[buzuki]

I havent seen a gas system which does what you say. The gas system will have relays for fuel pump and injectors thats pretty much it.

[Silver Caravelle]

Hi, I would first rule in or out the distributor/Hall sensor. Regards, Scott