So, new year, and I have renewed my interest in the Sud. After the last update when I finished fitting the twin carb engine and had it running perfectly in the garage, it broke down and would not restart. Cue pushing the thing back up a hill to the garage where I left it for 5 months. I went back last week to start again and try to figure out what was going wrong.
Starting with the timing, the dizzy cap was toast so I put the old one back in. On very close inspection, it turns out the cap is very slightly shoter internally than the old one. Externally, they are identical.
The diaphragm in the fuel pump was split too so that was swapped out. The car fired right up and sat idleing happily for about 40 minutes while I was setting the carbs.Happy days. As soon as I drove it out onto the road to test everything, it started miss firing and stopped. Cue the flashback to last September.
So I pushed it back into the garage and checked the timing, carbs and fuel. The petrol, although it was fresh, was coming out of the pump cloudy.
I syphoned out as much as I could and everything that came out seemed nice and clear. Nothing for it but to drop the tank. I wasnt expecting it to be this bad:
About 7 litres of this sludgy brown water came out of the tank and the filter on the sender unit was damaged:
What was throwing me was that it would run in the garage but not on the road. The level ground (and gaps in time between trying to start it) kept everything seperate in the tank. There is a slope out of the garage so once on the road, this crud was mixing with the petrol and being drawn into the carbs. I guess cars wont run on rusty petroly water
So the tank has been drained and cleaned. Ill be refitting it next week and hoping for the best. I really want to put an end to this difficult rebirth and put some miles up on it.