Toyota Corolla Engine Problems

DEPOSITS do build up on injectors in time, making the engine run rough and causing loss of power. Some dealers recommend cleaning them as a precaution, but I would be reluctant unless the engine is running poorly. The cost you have been quoted is far too high. An injector-cleaning specialist would typically charge about $100.

YOU can use them without causing any damage to your engine, but long-life spark plugs are considerably more expensive than regular ones and you should consider this before installing them.