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What Controls Ignition timing?

864 Views 1 Reply 2 Participants Last post by  gyrate
So The LH Bosch ECU only have a few fuel trim maps and the air flow table... no ignition maps.

I can't see any other ECU, but there is that Ignition module on the drivers fender. Is that the sole unit for ignition? If so that is :(
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its a combination of things.. what are you trying to do?
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