Electronic Fuel Injection EFI systems are very popular, and for good reason... they promise increased reliability, throttle response, and can tune themselves. The Holley Sniper is a great example of a self-contained system that provides great performance in a smart package. However, underhood electrical interference can cause these systems to run poorly or erratically, so we show you some things to look for if your Sniper EFI or other EFI system isn't running properly. From The V8 Speed & Resto