Hey everyone. I just moved house again.

My 1800 dual carb kombi had been running terribly. When I started it up a few days before I moved I thought the volkswagen fairy had visited.
It started first go. It didn't cut out on acceleration and it ran much smoother. It seems to be running on all 4 now too.

On further inspection it turned out the reason it's running better is that the fuel cutoff solenoid became unplugged on the right carb.

Shouldn't the cutoff solenoid becoming disconnected make it run worse? what's going on?

I've tried to figure it out but it's beyond me.

Any ideas people?

try checking the wiring, perhaps its faulty. sounds like a good one to sort out

wiring's all fine. both solenoids operate too. not sure if they're doing their job, but they go click when I apply current. I just don't get why the motor runs better with one side disconnected. Could there be a leak or a blockage in the idle circuit somewhere?

most probably a blockage in the system or something... maybe an air leak. Maybe try replacing the little o rings on the idle adjustment screws ontop of your left carb. Good to hear the move went well and the bus is running

I find when running ruff (woof) go simple things first check the fuel filter

I think a tight valve will make it iddle weird as well

my 1800 was running really rough checked everything then checked the valves and found 2 that were a little tight checked and adjust them all and it idled much better
Hope this helps

Marc

not 100% sure until I take it for a drive, but I may have found the problem.
The solenoid on the right hand carb was loose. For some reason it was partially unscrewed. I guess it was letting through too much fuel or letting in air or something.

After I tightened it, the van was hard to start, but it hasn't been started in a week, it's been on ramps and it's been rining so I'll let that slide. Afterwards it was an instant start. No idea if it's a gutless wonder though.

Sticky valves is a possibility too. I should have checked that when I had the rockers off yesterday to fix pushrod tube leaks. Ah well, maybe later.