Chuck is right re. the Casper's tester.... it's the only way to really test the cp/module assy. Autozone,etc. will 'test' the module, but their 'test' will not identify a faulty module, and is thus useless. IF the coil itself ohms out ok, then separate the coil pack from the module and check to make sure none of the spade connectors are shorting/grounding, and that the potting material in the module hasnt' turned to 'goo'. If it has, that's a (nearly) sure sign the module is bad. If either symptom (hi/lo ohms, gooey module) is present, just replace the part(s). I'm guessing this is what you will end up doing. The coil pack is relatively cheap, and modules can be had while still keeping your firstborn also. RedRegalT on this board may have some tested-good used combo's available. Watch out for the aftermarket modules from the local part store. Some have had success with them.... others have definitely not..... One reputable source for the OEM ignition components is: w's, dot, nos4gn, dot, com.