Checking for a good spark is one of the first steps to diagnosing a troublesome petrol engine. The ToolPRO In-Line Ignition Spark Tester is the quickest way to determine if a lack of spark is the issue. This simple device slots straight in between the high tension lead and the spark plug, clipping into the lead – and over the end of the plug. Now, when the motor is turned over, the ignition spark tester should flash as the spark goes off. If there is no such activity – further efforts to solve the problem can be directed at the ignition system - or the spark plug and lead in question. Save yourself some time and cut to the root of the problem with a ToolPRO In-line Ignition Spark Tester.