Vehicle Diagnostic Tools
Use these tools alongside the guides to confirm trouble codes, analyze charging and vacuum patterns, compare tyre sizes, and choose the right battery fitment.
Battery Group Size Finder
Match group size, terminal layout, and CCA for the right replacement.
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CCA Requirement Estimator
Estimate the cold cranking amps needed for your engine and climate.
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Charging System Voltage & Drop Checker
Interpret charging voltage, ripple, and cable drop readings in one pass.
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Compression Test Spread Analyzer
Analyze cylinder balance and compression spread in seconds.
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Coolant Mix Calculator
Calculate concentrate and water amounts for the right mix.
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Engine Vacuum Gauge Interpreter
Translate idle vacuum and needle behavior into targeted next checks.
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Fuel Efficiency Calculator
Convert MPG and L/100km, estimate costs, and track fuel economy changes.
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Fuel Trim Interpreter
Understand STFT and LTFT readings to spot lean or rich conditions.
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OBD-II Error Code Lookup
Decode check engine light codes and understand common causes fast.
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Parasitic Draw Battery Drain Calculator
Estimate how long a key-off draw will drain your battery.
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RPM vs Speed Calculator
Estimate road speed from RPM, gearing, and tyre diameter.
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Tyre Size & Diameter Calculator
Compare tyre sizes to keep speedometer, clearance, and gearing in line.
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