FiTech EFI system

mike heasley said

Having some issues with fitech go street.
The other day father was driving it. Started dropping cylinders. Got it home. Only the two injectors on the passenger side are firing. Absolutely nothing coming out of the two injectors on the drivers side.
Anyone else ever had this issue?
Thinking about swapping right and left injectors to see if injector problem or if they are not getting signals to fire.

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Swapped injectors from right to left. So now the two that did work, don't work. And the two that didn't work, now work.
So obviously its an injector problem.
New to the efi, anything I should be looking for to keep this from happening again?
Fuel system is an inline pump with a pre filter before pump, pump then a 10micron. Filter right before the efi system.

Called fitech waiting to talk to a person for 26 min. Then they hung up on me. Called back waited 35min. Had to hang up, time to leave for work.