92 Mazda Protege LX 1.8L DOHC. Starter soleniod intermitently engages engine to crank it. Tried new starter just spun did not crank engine. Old starter seemed to work better, it would sometimes crank the engine and it will start. Tried solenoid off new starter on old starter same issue. Electrical problem? Both starters tested good outside of car. Solenoid engaged and stater spun.