Hey guys, got my wiring harness back today, all the continuity on the wires seem fine. When the ignition is turned i get the clicks from the relays and the pump powers on, then powers off until the engine is cranked. It smells like there is fuel being pushed through the injectors (thou havent checked properly yet). but i have no spark.
What are the common causes of no spark? Hopefully there is something simple i can check incase it is that!

Will it not spark if the voltage drops below a certain amount? The engine will crank over but rather slowly tbh as the batt hasnt been charged in a few months.

Thanks in advance!
Regards, Mudge