Originally Posted by Mudpie
I did ground the plug, and moved the wire to each of the 3 coil packs to check. No spark anywhere.


You'd have to check from the coil pack primary volatge back. I'm not familiar with your system but the basics are the same. Primary voltage switches on/off to coil. The computer switches the voltage, usually by ground switching as positive voltage is constant connection.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles