ok now I replaced the switch make sure all wires are pushed in to the connecter now it wont start, it has fire it has fuel,put noid light on injecter and the one I checked was firing. I check the compression in 2 cyls 60# so I figure the timing chain jumped pull it down and the marks line up. the chain is super loose. will a motor even run with 60# of compression. was running smooth before no blown head gasket clean oil wtf. car does not smoke, it does have a lot of miles on it. the new plugs were black too much fuel ???