I would start by checking the resistance between each pair of coil terminals (front terminal to rear terminal). Normally the resistance is in the range of 11k-13K ohms. Check it when the engine is hot. If the resistance is outside of this range, the coil is probably bad and you need a new coil pack. Note that this test is about 75% reliable and sometimes the coil will pass the test and still be bad.
And, yes, the module could be bad as well. Without a Casper's coil/module tester, the best way to trouble shoot the thing is by swapping with someone else's coil/module pack.
You are confident the plug wires are good?
And, yes, the module could be bad as well. Without a Casper's coil/module tester, the best way to trouble shoot the thing is by swapping with someone else's coil/module pack.
You are confident the plug wires are good?