1st of this is not in a buick so the msd numbers wont be the same as used here.
dif gen7 with the latest upgrades to the ecm.
code 66 Ignition output driver over
current
Driver current exceeds 2.5 Amps MIL set, shut ignition off
in an attempt to resolve this
tried:
2 msd digital 6 boxes
1 msd 6a box
ran a complete new wire for the blue est circuit from the dfi box to the msd white wire.
msd boxes are installed exactly as per msd instruction.
msd box is mounted on pass side floor using rearmost seat mounts ( seat no longer there). msd box used to be under hood and we moved it inside. same failure occured with borrowed know good proven 6a box mounted inside.
dfi box is mounted in pass front corner to A pillar bar of cage.
2 coils swaped, terminal is mounted vertically and grounded properly
the only thing remaining on the cirucit is the factory tach.
of course the next thing to try is disconnect the tach.
skeptical at this point if this will resolve the problem
failure occurs most often in a burnout. burnouts hit 8k.
havent datalogged burnout or 12v+ duing a run but last night at the 1-2 shift at 8k rpm (this is the shift point for the combination, not a typo) it shut off.
past failures during a burnout we didnt attempt to make a pass, last nite i did.
when it fails you simply clear the code and fires right back up.
on rarer less frequent occasion will have had it shutoff at idle. most often without a code occuring. only 1 time did it code from idle.
so far accell hasnt been able to help.
so anyone here had any expereince chasing down a code 66?
even the remotest idea or possibility would be greatly appreciated.
thanks in advance
ed
dif gen7 with the latest upgrades to the ecm.
code 66 Ignition output driver over
current
Driver current exceeds 2.5 Amps MIL set, shut ignition off
in an attempt to resolve this
tried:
2 msd digital 6 boxes
1 msd 6a box
ran a complete new wire for the blue est circuit from the dfi box to the msd white wire.
msd boxes are installed exactly as per msd instruction.
msd box is mounted on pass side floor using rearmost seat mounts ( seat no longer there). msd box used to be under hood and we moved it inside. same failure occured with borrowed know good proven 6a box mounted inside.
dfi box is mounted in pass front corner to A pillar bar of cage.
2 coils swaped, terminal is mounted vertically and grounded properly
the only thing remaining on the cirucit is the factory tach.
of course the next thing to try is disconnect the tach.
skeptical at this point if this will resolve the problem
failure occurs most often in a burnout. burnouts hit 8k.
havent datalogged burnout or 12v+ duing a run but last night at the 1-2 shift at 8k rpm (this is the shift point for the combination, not a typo) it shut off.
past failures during a burnout we didnt attempt to make a pass, last nite i did.
when it fails you simply clear the code and fires right back up.
on rarer less frequent occasion will have had it shutoff at idle. most often without a code occuring. only 1 time did it code from idle.
so far accell hasnt been able to help.
so anyone here had any expereince chasing down a code 66?
even the remotest idea or possibility would be greatly appreciated.
thanks in advance
ed