new ecu, check engine light on

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Jul 9, 2004 | 01:33 PM

Chris_Bye

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Joined: Dec 2003

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From: NYC

new ecu, check engine light on

i just installed a new ecu, but now the check engine light is on and it is idling kind of roughly. It was a 90 teg ecu into a 91. is this normal?

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