Well I managed to get 2 out of 3 working and after soldering and other additions they "work". I find them hard to read sparks and don't always "connect" well. But for a spark test as a last resort I assume they would be fine. I have used them on both my Ranger and Mustang. They don't work well with coils on candles.
MUCAR CDL20 OBD2 Scanner - Check Engine Code Reader And Diagnostic Scan Tool For All OBD II Protocol Cars Since 1996, With O2 Sensor, EVAP System, And Smog Test Functions
23 Review
Vgate ICar Pro Bluetooth 3.0 OBD2 Code Reader | Scan Tool For Torque Android To Check Engine Light & Car Faults
19 Review
eTORK 3/8-Inch Drive "Click Style" Electronic Torque Wrench: Precise Torque Control (25-250 In. lbs., 2-20 ft.-lb.)
12 Review
Autel AP200H OBD2 Scanner Dongle - Wireless Bluetooth Code Reader with Health Status Reports - Diagnostic Tool for Engine, Transmission, ABS, SRS - OLS/BMS Resets - All Vehicles (Android/iOS)
11 Review