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Unless you've had an engine swap to something uncommon, the fuel pump is what pressurizes the injectors. The injectors are electronically controlled valves, that let out a precise amount of fuel when the computer tells them to open and close. The fuel to them is supplied, at pressure, by the fuel pump. The only common exceptions to this are diesels, ancient satanic bosch fuel injection, and ultra-modern direct injection gas engines...

I’d check the fuel pump relay. Maybe the contacts in that are dirty and don’t always make a good contact, making it look like the fuel pump is the issue. The fuel pump relay will be located on a bracket beside the main ignition/power relay. The ignition relay is a brown six pin relay. I don’t know exactly where it’s located in your model though. I hope it’s a simple fix like this. Cheers Bennie