Cant get codes-need definitive answer
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New User
Joined: Feb 2005
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Originally Posted by threewaters
You may want to track your ECM ground. My 85 4.9 has a separate ground attached to the negative post. The connector near the post was bad and that caused a battery drain and the ECM went inoperative. But you are not mentioning a battery drain in your thread.
Senior User
Joined: Jun 2003
Posts: 390
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From: Rose City, MI
i have same problem also but i am going to solve it by switching to the duraspark ignition system soon. Simpler and lots less wires. make sure your fuseable link is good and that it is well grounded and other things mentioned above.
