What is the firing order for a fuel injected distributor cap?
Fuel injection systems don't use distributor caps. Distributor caps are a feature of older, carbureted engines. Fuel injection systems use electronic ignition systems, often with individual coil packs for each cylinder, or a coil-on-plug (COP) system. Therefore, there's no firing order associated with a "fuel injected distributor cap" because one doesn't exist.