High Quality Content by WIKIPEDIA articles! MegaSquirt is the registered trademark of an aftermarket electronic fuel injection (EFI) controller designed to be used with a wide range of spark-ignition internal combustion engines (i.e., not diesel engines.) It is a complete standalone fuel injection controller with software and hardware, developed by Bruce Bowling and Al Grippo, developers that work on the US East Coast. The software for the platform is open for modification (for use on Bowling and Grippo hardware only). The hardware provides for only fuel, ignition and idle air control in most cases, keeping the cost low (though there are user configurable outputs in most cases for other functions). The hardware is open in that the schematics are available for troubleshooting and educational purposes, but not for copying. The product is aimed at the DIY market as in most cases MegaSquirt requires assembly and tuning by the user. Basic costs can be below US$300 as of 2009, although this will vary widely depending on application.