What engine? Is this coil on plug? Is the check engine light remaining on?
Do you have a code reader or a scan tool?
Refer to this test procedure, click here and perform these tests. Hold on one moment while I find a wiring diagram.
Ok here are 2 wiring diagrams, click here.
The 2nd is 3 combinned and the other shows the ign coil drivers. They call ign #1 driver pin K19 in the test, but I believe it is actually K91 in the diagram.