Re: LS Engine gurus chime in PO335
If I read this right you pulled 1 sparkplug wire off while engine was at idle and no misfires or P0300 DTC ?
If CKS was bad and PCM could not see any signal from it then it also would not know CKS position to CAM sensor position and engine would run like crap and have a hard time starting
IF CKS wiring pins dirty, loose connection, maybe then there is a very short timeframe ( under 4 seconds) PCM sees no signal but not long enough to cause misfires.
Well maybe due to weak cell of battery, loose,dirty ground splice pack or dirty pins on either CKS or even at PCM side.
Else one of the 3 wires got nicked and temp shorts to ground
Try to induce it while connected to a scanner and watch the "current" misfire counters along with the CKS parameters so pinpoint if real issue or wiring or voltage issue
Mike M - 2001 / 2008 Z06s