Wasted spart not giving a wasted spark??

[vr6]

I have been running megajolt for years now without fault and have recently removed the gearbox for a rebuild. On refitting the engine i have a poor running condition and on further investigation found that on cylinders 1 and 2 there is no wasted spark. I use a timing light with sensor on the plug leads to check for spark feed and on 3 and 4 there is a constant high speed flicker from the timing light as you would expect but from 1 and 2 only maybe half speed or less, ( the meter gives a lower timing advance based on the pulse speed )an odd situation as the coils on 1 and 3 are connected internally and 2 and 4, I figured the leads were bad but a new set later and its still the same. I tested the coil pack and all measurements fall within specification.


Any ideas folks, thanks

[brentp]

That is an odd problem. You may want to check the EDIS module, or the wire connections to the coil pack!