I could never communicate with my SymTech MegaSquirt ECU.

If you were never able to successfully communicate with your MegaSquirt ECU, there are two common causes. First, be absolutely sure your Megasquirt ECU is wired properly. Pay particularly close attention to the +12V and ground connections. You can access our various wiring guides on our main support page:

• SymTech Labs Support

Next, ensure your serial connection is properly configured. You can view our articles on configuring serial connections here:

• USB-serial Adapter Connectivity
• Built-in Serial Port Connectivity

Please feel free to contact SymTech Labs' support team if you cannot establish communications after taking these steps.

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