The comment about the 8 plugs in a 4cyl engine sparked a memory of a Friends Nissan truck...
He was having some minor issues with it and thought he'd reset the ECU:
"also try to wake up the ECM by disconnecting BOTH battery cables and shorting them together- to clear any codes."
DO NOT!!!..do this..DO NOT!!
My friend did this on his older Nissan,and ended up scrapping it.
Shorting the battery cables together somehow fried his ECU and everything. The dealer's estimate to fix it was more than the truck was worth! It was towed to the scrap dealer the following week.
