lmans

ok.just sort out a pulley and crank senor problem.car was running sweet but then it started revinging funny,popping an baNGING and it wouldnt pull off unless i floored it.the fuel cut off switch keeps kicking in (in the boot).also when i put my jump start kit on it i got sparks from possitive and negative sides of the battery and the box wasnt even switched on. any help please?