My #1 coil-pack plug was broken and would work itself loose after a while when driving. Would start missing badly and I'd have to pull over and push it back on good. I went and bought a Pulsar coil-pack loom for about $50 and cut the ends off to fix my broken ones, no more problem! You could really tell it was a "mis" though, lost power and exhaust note changed dramatically. Have never had an injector go out up till now, so don't know what that feels like compared to this.