I always say this in general, if you're going to work on a EFI car,
you need a fuel pressure gauge and a scanner in your tool box arsenal.
From experience, on my old Buick PA, I pressure tested and flow tested it when I was in fuel systems training. It was in perfect order. A little less than a year later, guess what? I go out, start the car, let warm up for a few minutes while getting my lunch together, come back back out, and bam, just as I get in, it stalls, first time ever. Go to roll it over, and eh eh, no, the pump just abruptly quit.
There is always the chance that it may not be pump. But when you're trying to diagnose a problem on a EFI, computer controlled vehicle,
nothing can be assumed.
It needs to be confirmed as not a suspect.
You can get a basic gauge for a reasonable amount (30-50 bucks). I just hate seeing parts shotgunned in the prayer one will hit the problem area.
BTW, I 've heard nice things about the injectors from those guys with blue ovals in their logo
