hello to all
i have couple of question
1=how do you determine a softfail fuel pump
2=is the fuel pressure suppose to drop a tad when vacuum is applied under load
my fuel pressure is 42 with key on and 50 to 52 running when checking fuel pressure regulator if i applied vacuum it drops down to 42

the reason i'm asking because it seems i'm running out of fuel when down to 1/4 tank

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4/02 x5 3.0i AUTO BLACK
KISSIMMEE FL