Diary - 427TT install

[stevieturbo]

That's incredibly strange for a coil to do that. What coil's are you using ? Some sort of aftermarket, or standard ?

Its surprising the HT voltage going into the LT side hasnt damanged any other components, especially the ecu itself

Faulty coil packs ( oddly caused by wrong spark plugs ) on some POS French cars can actually fry the ecu for similar reasons.

[monkfish1]

If i hadn't witnessed it in the dyno room, i probably wouldn't believe it either!

Coil packs are stock GM.

[neiljohnson]

Maybe replacing coils should become a service item on engines this highly specced i have seen damage like this caused by misfires before as the fuel ignites detonates uncontrollably due to heat/ compression hence the damage.

[monkfish1]

neiljohnson said:

i have seen damage like this caused by misfires before as the fuel ignites detonates uncontrollably due to heat/ compression hence the damage.

[stevieturbo]

It can actually be quite cool to view an engine at night. The arcing you see sometimes is quite spectacular, although its usually around the plug area. A little di-electric grease around the plug boot/plug can help.

[neiljohnson]

stevieturbo said:

That's incredibly strange for a coil to do that. What coil's are you using ? Some sort of aftermarket, or standard ?

Its surprising the HT voltage going into the LT side hasnt damanged any other components, especially the ecu itself

Faulty coil packs ( oddly caused by wrong spark plugs ) on some POS French cars can actually fry the ecu for similar reasons.

Not only french cars the italians and germans enjoy this problem too

[delmeekc]

Would early signs show up as a DTC code thing as I know there is a section for miss fires. Or is this something that won't get picked up. I always display knock retard on the gauges. There's nothing wrong with mine, I'm just curious.

[neiljohnson]

delmeekc said:

Would early signs show up as a DTC code thing as I know there is a section for miss fires. Or is this something that won't get picked up. I always display knock retard on the gauges. There's nothing wrong with mine, I'm just curious.

trouble is when am engine is this highly strung the damage is normally done before the ecu realises there is a fault

[Harryoz]

Harryoz said:

jamiep said:

Bad mapping has caused that, get a better mapper.

Probably, any suggestions?

For the avoidance of doubt, and in case Paul's reading, the above was not a serious post......

[jamiep]

Ive never heard that one before but am happy to have it explained to me? If a coil pack goes down or a misfire happens that cylinder should get cooler from the unburnt fuel? not hotter? please correct me if im wrong or tell my why my thinking is wrong, always happy to learn new stuff.

Edited by jamiep on Sunday 28th February 14:47

[neiljohnson]

jamiep said:

Ive never heard that one before but am happy to have it explained to me? If a coil pack goes down or a misfire happens that cylinder should get cooler from the unburnt fuel? not hotter? please correct me if im wrong or tell my why my thinking is wrong, always happy to learn new stuff.

Edited by jamiep on Sunday 28th February 14:47

When the plug goes down the fuel still ignites due to the heat and compresson that is in the engine but instead of a timed burn its more like an explosion which is what causes the failure of the piston.