hi! jeff .. 10 days....umm well i did'n get any message from the computer it all , it took me about 30 mins , disconect the wire plug, then remove three bolts (bottom is a little tricky take top of air box clener out ) ,disconect 3 prong plug from the module which is part of the coil assy put back in reverse order your done... before you do this check for spark at the coil (ground cable to strut tower) and see if the spark is strong .. then do the same with your other car and go from there .... good luck