That "could" mean the pump is weaker on one cyl..
An easy test is to take the injectors out and put the fuel lines on them (off the engine) so you can see the spray pattern. Use 2? plastic/glass see through cups and have someone crank the engine so you can look at the patterns.
DO NOT put your hand in front of a firing injector or it will inject you with fuel and you will need a hospital!! Use see through plastic/glass cups to get the visual on a pattern
Patterns should be the same on both if the pump is good.
Ken, East Prov., R.I. Bootlegger, PY26 Paceship
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