1) Auto tune-up item 2) Autobot 3) Car part 4) Comic-strip horse 5) Ignition system device 6) Initiator of action 7) Tune-up item 1) Dynamo 
[Transformers] Sparkplug is the name of several fictional characters in the various Transformers universes. ==Transformers: Generation 1 (adult)== Sparkplug Witwicky is the patriarch of the Witwicky family who was vastly unlike his two sons, in that he was portrayed in startlingly different ways across the two main fictions. The Transformer...