Review on GTC GTC505 Engine Ignition Analyzer: Revolutionizing Engine Diagnosis and Performance by Anurak Grubb

I can't give this tool the full 5 stars because it's a bit expensive - most likely due to ZERO competition. This is a MUST-HAVE tool for effectively diagnosing ignition problems, especially with modern coil-on-plug systems. This tool will save you a lot of time! Navigating through all the options takes a bit of getting used to. Pressing each button to cycle through multiple modes is counterintuitive, but it's not the worst. I use it to monitor spark voltage versus burn time and the display shows either a graph or a real time curve. It can also act as an accurate tachometer, so you can do without the (expensive) inductive time display. The built-in battery lasts quite a long time and should easily last a whole day. It comes with a dual mode charger - US version with 110V AC and USB plug. this also applies to injectors. Revain please - start selling the GTC-605 too!