Find the fault. Quote the fix. Replace nothing else.

What an engine diagnostic actually involves

Half of the cars that reach our gate with a check-engine light leave again without a single new part. Sometimes the fix is a loose fuel cap, a degraded MAF sensor that just needs cleaning, or an aftermarket reverse camera shorting the body control module. We charge a flat RM110 to find out which it is. If you proceed with the repair, that fee is credited against the job.

The bench we use

• Autel MaxiSys Ultra and Launch X-431 scan tools for live data and bidirectional control
• Pico oscilloscope for ignition, injector and CAN-bus waveforms
• EVAP smoke machine to chase down emission leaks
• Compression and leak-down tester for cylinder health
• Fuel pressure gauge set and injector flow bench

Common faults we resolve every week

1. P0420 / P0430 catalyst codes — usually an O2 sensor, occasionally a real catalyst.
2. Rough idle on warm restart — often a stuck IAC valve or carbon on the intake.
3. Random misfires at altitude — typically aged coil packs or fouled spark plugs.
4. Engine stalls at traffic light — fuel pump pressure drop or alternator voltage swing.
5. Oil consumption above 1L per 2,000 km — valve stem seals, PCV check first.

What you walk away with

A one-page diagnostic report. It lists the fault codes pulled, the live data we captured, the test we ran to confirm the cause, and the recommended action with a fixed-price quote. Take that report anywhere. We'll still be here if you want us to do the work.