Most of the time spent on an ignition problem is not the repair itself, it’s diagnosing the misfire code, conducting rounds of trial-and-error repairs and sometimes uninstalling and re-installing ancillary engine components. When a cylinder is not contributing and a misfire begins ticking up consistently, endless things might be the cause. Things like: the injector,
Many factors can cause a spark plug to fail; from incorrect heat ranges to improper gapping, to chemical contamination. Yet 90% of spark plug damage claims are due to improper torque.
Five things you need to know about spark plugs: anti-seize; corona stain; gapping fine-wire spark plugs; torque; and cooper plugs.