What should not be used when working on ignition systems?

When working on ignition systems, it is essential to avoid using power tools. Power tools can generate excessive heat, which poses a risk of damaging delicate electrical components in the ignition system, such as the ignition coil or spark plugs. The precision required in working with these components means that manual tools, like hand tools, are generally preferred, as they allow for more control and reduce the potential for damage.

Additionally, ignition systems can be highly sensitive to electrical interference. Using power tools can introduce unwanted electrical noise, which could impact the performance or safety of the system being serviced. Therefore, sticking to hand tools is a safer and more effective approach when dealing with ignition systems to ensure reliability and functionality.