Few years back i bought a Peugeot 405 1.6 carburetor, it was a special order car, all the others had fuel injection. I bought it like 10% of the going rate for those cars. It would not run and before it die it was running like crap and its been to all the mechanics shops around town. After it died no mechanic would touch it, so i drag it home and spent an entire evening, going thru the fuel system took the pickup tube and seen it had more than 1/2 tank of fuel, prime the mechanical fuel pump, took the carburetor hat and seen the accelerator pump spraying fuel, removed clean and return the spark plugs like 20 times, it has spark, its in time, check the timing belt, no fire. After lots of frustration i had a propane torch setting in the work bench, i shaved it in the carburetor and try to start it and it fired, tried to rev it it backfired and throw a gallon of liquid out of the exhaust, i took the now burning torch out of the carburetor and tried to light the black liquid and it did not light on fire. So took the fuel pick up out of the fuel tank again, suction out all the content of the tank and found someone has filled it with water, it had only few liters of gasoline on top, put some gasoline back reasembled it, and it fired up. From then on first step check the state of the fuel. To finish the story with that car, i stayed all night , found it to have a intake gasket leak. Cut a new gasket tune the carburetor, changed the locks, it had no keys. Next day drove it to get the title transferred, and the seller bought it back, for 2K higher. He drove that car till recently and had 860 000 km on the clock, which is a lot and was going strong but a runaway dump truck made it in a pancake. I was sad when i've seen it in my local junkyard, never thought i'll be sad to see the ugliest 405 die.