Fiada Compression Tester Kit and Spark Plug Tester — 9-Piece Black Kit with 300 PSI Gauge & Molded Case

Fiada's 9-piece compression tester kit combines a 300 PSI dual-unit gauge and a spark plug tester to diagnose cylinder pressure and ignition issues on cars and motorcycles.

This compact, organized kit gathers the most common adapters and a spark tester so you can measure compression and verify spark quickly without multiple trips to the shop. The kit includes a 3" 0–300 PSI (0–20 kg/cm²) gauge with protective rubber around the housing, a selection of brass and rubber adapters for various thread types, a 14" extension hose and a visible spark plug tester. Everything fits into a molded ABS case for neat storage and transport.

How does this kit check cylinder compression?

The compression gauge screws into the spark plug hole (using the appropriate adapter), letting you read peak compression while cranking the engine. This reveals cylinder health and can indicate worn rings, leaking valves, or head gasket issues.

• Attach the correct brass or rubber adapter to match the spark plug thread.
• Use the 14" extension hose for recessed or hard-to-reach spark plug holes.
• Crank engine four revolutions with throttle open; read peak PSI on the dual-scale gauge.

What can the spark plug tester tell me?

The included spark plug tester visually confirms whether ignition spark is being produced and delivered to the plug. It helps isolate ignition faults such as bad coils, high-resistance leads, fouled plugs, or grounding problems without removing the plug from the boot repeatedly.

• Connect the tester between the plug and plug wire to view spark under load.
• Safe visual check to compare spark intensity across cylinders.
• Helps pinpoint ignition-related misfires before deeper disassembly.

Which vehicles and engines will these adapters fit?

The kit is made to be broadly compatible with most car and motorcycle engines thanks to eight compression fittings and two rubber cone adapters. It covers a wide range of thread sizes and recessed plug designs commonly found in passenger cars, light trucks, bikes, and small engines.

• Four brass threaded adapters accommodate many common spark plug sizes.
• Straight and curved rubber cone adapters seal on non-threaded or irregular ports.
• Ideal for gasoline engines that use spark plugs; not for diesel engines without glow plugs.

How easy and safe is it to use this kit at home?

The kit is designed for DIY mechanics with basic engine knowledge. Follow simple safety steps like disabling the fuel system and ignition to prevent accidental starts while testing; the instruction notes emphasize disconnecting ignition and fuel components before proceeding.

• Remove fuel pump or fuel-injection fuses and disconnect coil or ignition leads first.
• Hand-thread the gauge into the spark plug hole to avoid cross-threading.
• Switch off the vehicle and remove the key before changing adapters or touching the tester.

Who is this for: Fiada's 9-piece compression and spark plug tester kit is made for hobbyists, independent mechanics, and fleet technicians who want a reliable, portable set for routine engine checks. It suits anyone diagnosing misfires, uneven compression, or verifying spark without needing heavy shop equipment, and it’s a practical addition to a home garage or service van.