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RegCharie View Drop Down
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Joined: 07 January 2014
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Post Options Post Options   Quote RegCharie Quote  Post ReplyReply Direct Link To This Post Topic: ECM
    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
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Patrick View Drop Down
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Post Options Post Options   Quote Patrick Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2014 at 10:51pm

Originally posted by RegCharie RegCharie wrote:

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.

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.

Originally posted by RegCharie RegCharie wrote:

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.

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 View Drop Down
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Post Options Post Options   Quote RegCharie Quote  Post ReplyReply Direct Link To This Post Posted: 20 February 2014 at 9:13pm
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
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