Quote:
Originally Posted by Gimpster
It seems that since the igniter limits dwell (and thus spark energy) they get blowout issues....
Like I said though, ONLY the 1995 Avalon got the smart igniter. Far as I know, the other V6's all have "dumb" igniters so it's a non-issue for you guys.
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the toyota tech docs list most igniters as smart igniters. the earlier (94) 1MZ had a 6 channel smart igniter, a channel for each coil. the later ones ran the 3 channel for wasted spark, but most of the diagrams listed for the V6 cars have a dwell control component in the igniter itself.
i don't think the spark blowout issue in the igniters is so much the dwell time as the internal current limiting. i haven't been able to find much data on that, but the few scope shots i've seen of toyota igniters in action limit the coil current to about 6.5A regardless of dwell time, which typically limits the coil to ~75mJ.
bosch makes some multichannel igniters that charge to about 9A (which would almost double the spark energy), but they're pretty spendy. the 3 channel was used on the alfa 164 V6 i think.