ECM
Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=3418
Printed Date: 29 April 2024 at 2:58am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: ECM
Posted By: RegCharie
Subject: ECM
Date Posted: 13 February 2014 at 9:08pm
 Hope someone has an answer. When I got my Fiero it was not running with a thermostat. I put the one in that was included in the spare parts and after a short drive the "Service Engine" light came on. I got a new thermostat and tried again, with the same result. To check the problem I shorted the ECM's A & B termianals, turned the ignition on and the Service Engine light flashed 1 - 2 (pause) 1 - 2, which did not tell me anything. Any suggestions? Thanks ------------- Reg Charie New Fiero Owner |
Replies:
Posted By: Patrick
Date Posted: 13 February 2014 at 10:51pm
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If you're wondering why the "Service Engine" light came on with the thermostat(s) installed, and not without, it's probably because without a thermostat the engine never got hot enough for the ECM to go into closed loop operation.
How many times did you watch it repeat that pattern? It'll show that response three times before it shows any stored trouble codes.
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RegCharie wrote:Posted By: RegCharie
Date Posted: 20 February 2014 at 9:13pm
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I think I let it run 5 or so times..but there might have been a break due to me not having a solid connection on the jumper. ------------- Reg Charie New Fiero Owner |