Have you replaced any of your brake hoses , or looked at them , I redone my brake system when I had the engine out for overhaul three years ago , replaced all the hoses when I found one that had cracks and was seeping , replaced everything , lubed the parking brake cable too, I do not want a future problems with brakes when I need them when towing my camper , or like a old Chevrolet when the brakes get wet , you hit the brakes and it goes faster , I also flush all of my cars brake system every four years , you would be surprised how dark the fluid gets over time , as for you choke it may just need a clen and lube on the linkage, if your choke coil does not work check the alternator for output , if it good check the wire the plug on the back of it to terminal marked STA , or sater , its white with a black stripe , it is hooked straight to the choke coil , that way it only heats up when the engine is running , hope this little info helps , later Blaine