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Supra Addict Since 1984
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362 Posts
I'm thinking your ECU is registering engine error codes and trying to tell you about them. Your big bang red exclamation light is probably also lit, right? Don't disconnect the battery yet. If you have access to a technical manual for your year, it will decsribe how to reveal which engine error codes are stored. Instructions and error code listings are also on www.mkiv.com

You may find it easier to see if your local Toyota service manager will hook up on of their interface modules and tell you which error codes are present.

Good luck!
John

www.utahracing.com/supras/john.html
 
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