On Monday I intended to go for a run on my FJ1200. I fuelled up at my local filling station and got on my way. After about a mile the bike started spluttering. My first thought was that I filled up with diesel but I was sure I hadn't. The bike stopped and only re-started with difficulty. Luckily I was near home and it was all downhill. I managed to splutter home.
The problem seemed to be fuel starvation so I suspected the fuel pump. The FJ doesn't really need one and I ran my old bike for 6 months with the pump by-passed. I did this and the bike ran ok. So back on my way but after a mile it was spluttering again. Back home and fuel was pouring out of the bottom of the bike. This sometimes happens when a float valve sticks but this only happens after a lay up when the fuel evaporates.
I had a coffee and thought about it. Fuel was getting to the pump so it wasn't a problem with a blocked filter. The pump was working (I could hear it clicking) It wasn't a problem with a carburettor because the bike has four and would run with one (or even two) out. I re-connected the pump and the bike ran ok. It's now 120 miles without a repeat of the problem - it seems to have cleared. This is good but I'd like to know what was wrong.
I then thought that water might have got into the fuel so I'll try a fuel additive. Now I am very sceptical of fuel and oil additives that promise miracle cures but I reckoned that a dose of Wynn's Dry Fuel wouldn't do any harm. This removes water from the fuel system and also claims to clean things out, improve fuel economy, cure baldness etc etc.
|Can't do any harm, I suppose|