what was your original concern anyway? Did you replace the fuel pump(s) because of an issue or just due to age? Did you also consider replacing the fuel accumulator as well? Just to rule things out, get some new parts or known good units and retest. If your problem persists then you may have an intermittent electrical or ignition concern

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6