2001 748 starting issue

[robb916998]

Going to calabogie last week end and the 748 wont start , for hours of charging and trying and all it will do is turn over . Long story but I ended up taking the front spark plug lead off to test for spark and not only did it spark it started on one cylinder . it was hard to start again at the track and after we changed the plugs .
So today I went over all the electrics , wires, connectors, relays (took then apart and looked and cleaned contacts ) spent some time with her looking ! tried to start it and nothing again . took the front spark plug lead off again and it has no spark !!! so thinking is their really nothing I touch the lead while cranking ,,,
nothing for maybe 2 cranks and than yep my eyes light up and I loose some bodily functions . OH and it starts on one cylinder again .

any ideas hear people , coil shorting making it a low volt unit ?? I'm struggling with this one .
pick up sensor ? brain loosing its conative functions ??

thanx

[Rob374]

Is there any damage to the spark plug wire for the misfiring plug. Sometime tiny cracks form in these things and it shorts out to the frame or engine.

[Ric]

Corroded negative battery cable at the motor maybe.

[robb916998]

Brandon and I were just talking today about the possibility of a wire going bad so I think I will put the 916 units on and give that a try . I cant see any arcing or burn spots but maybe im not looking in the rite spots . Never thought of the grounds on the block , went over the battery , solenoid and relay connections . I give them a cleaning .
THANX