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What is the first sign that you need to replace ECM?
I picked one up at a junk yard today. White vette was in wreck two days ago with rear end and passenger side crushed. Passenger side looked ok. ECM look good on this 93 vette so I pulled it out and paid 30 bucks. Now I have a back up and just wanna know the first sign my 92 ECM would need replacing.