Check the Main Relay and the fuse.
What make , model an year vehicle ? Is it coil on plug ignition system or dis ignition . Did you test for battery voltage at the coil or coils ? Is the powertrain control module controlling the coils ? Does it have a ignition control module ? Automotive Engine Ignition Coil Testing Repair How to test an ignition coil and ignition module with test light
sparkplugs, air filter change and oil change.
pretty simple, took me about an hour to do everything.
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