KM20 Car Ignition Coil Tester & Ignition System Analyzer

KM20 Car Ignition Coil Tester: Precise Ignition System Diagnostics

KM20 car ignition coil tester is a specialized multisystem analyzer built for workshop technicians and mechanics to diagnose misfires and spark performance issues in gasoline engines. Relying on inductive technology, the device captures and analyzes electrical signals without requiring any engine parts to be disassembled or complex ground wires to be connected. The analyzer focuses on delivering three direct measurements essential for troubleshooting: spark voltage, spark burn time, and engine speed.

How KM20 Tests Car Ignition Coils & Systems

Spark K-Volt Measurement

The ignition coil tester measures spark voltage up to 50 kV. This is a relative measurement designed specifically for comparing ignition modules or spark plug wires within the same engine, helping technicians quickly identify the weakest cylinder or a leaking coil.

Spark Burn Time

The device precisely measures the duration the spark remains lit (up to 10 ms). Burn time is the most accurate indicator of combustion quality; abnormal changes here reveal issues with the fuel mixture or the spark plug gap.

RPM Measurement & Supported Ignition Systems

The tool dynamically displays the engine speed (RPM) in real time. Kzyee km20 supports a wide array of setups, including Coil-On-Plug (COP), Spark Plug Wire (SPW), conventional distributors, and distributorless ignition systems (DIS) across 2-stroke and 4-stroke engines.

Reading Results & Diagnosing Faults

The dynamic display shows maximum and minimum readings to help spot instant misfires. Technicians can correlate abnormal readings with specific mechanical or electrical causes based on the operating manual:

Causes of Long Burn Time

A long spark burn time typically stems from spark plug issues such as a short circuit, carbon deposits, or a very small gap. It can also indicate an extremely rich fuel mixture, a damaged coil insulator, or low cylinder compression.

Causes of Short Burn Time / High Spark KVolt

A short burn time paired with high voltage indicates a worn spark plug, an overly wide gap, or a loosely connected spark plug connector. It can also reflect high resistance in the ignition coil’s primary circuit or a lean fuel mixture. (Note: In SPW mode, placing the sensor closer to the distributor or DIS coil typically yields higher voltage readings due to internal wire resistance).

KM20 Technical Specifications

• Display: digital LCD 128 × 64, update rate 3×/second

• RPM measurement: 200 to 19999 RPM, 0.5% accuracy

• Spark KVolt: 0 to 50 kV, 3% repeatability (relative measurement for cylinder comparison)

• Spark Burn Time: 0 to 10 ms, ±0.1 ms accuracy

• Supported ignition systems: Coil-on-Plug (COP), coil-near-plug, conventional distributor, magneto, and distributorless (DIS)

• Measurement modes: SPW (spark-plug wire) + COP (coil)

• Engine cycles: 2 and 4 cycles + DIS

• Input impedance: 100 kOhm + 1.5 nF (minimum)

• Input protection: ±42 VDC max

• Spark KV calibration/adjust function: sets the reference reading

• Auto power-off: after 3 minutes of inactivity

• Power: 9V battery, ~20-hour life (alkaline)

• Probe length: 35 cm (includes capacitive pick-up)

• Dimensions: 165 × 100 × 32 mm (without antenna)

• Weight: ~363 g (with battery)

• Accessories: padded hard case, user manual, protective rubber holster, 9V alkaline battery

Components of the KM20 Automotive Ignition Coil Analyzer

1. Capacitive pickup

2. Flexible probe

3. Protective rubber boot

4. LCD screen

5. Power/Reset button

6. F2 button

7. Ignition System button

8. F1/Calibration button

9. Engine cycle toggle button

Compu-Car Trust & Warranty

Accurate diagnosis of intermittent misfires requires a highly sensitive measuring instrument capable of capturing millisecond changes in spark burn time. This level of precision depends entirely on the device’s original factory calibration. To ensure this reliability, we supply this analyzer genuine and direct from the factory, avoiding uncalibrated parallel imports, through Compu-Car—the authorized certified dealer in Saudi Arabia since 2010.

Your investment is backed by a full 2-year warranty that complies with Saudi Ministry of Commerce regulations, protecting the unit against manufacturing defects. Understanding that interpreting inductive spark readings requires technical expertise, our dedicated engineering team is ready to support you, ensuring you can read and analyze diagnostic data effectively.

For more info about the KM20, Contact Compu-Car team by WhatsApp from here, or call us on same number

Explore our complete range of professional workshop equipment From here.