What's The Problem? Lenehan Research offers their What Quits First? Intermittent analysis tool, that the company says, will save users from unnecessary parts replacement, multiple comebacks and problems associated with intermittent fault diagnosis. This tool eliminates 2/3 of the possible areas that could cause the engine to stall, analyzes the last second of operation and identifies whether the lack of fuel, ignition pulses or injection pulses caused the engine to quit. This new tool comes with a coil-on-plug inductive and works on most gasoline vehicles.