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SES Issues, may be bad computer?

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Old May 28, 2008 | 06:51 PM
  #1  
jminton's Avatar
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From: Willow Spring, NC
Car: 1985 IROC
Engine: 305 4bbl H.O.
Transmission: WC T-5
Axle/Gears: 3.73
SES Issues, may be bad computer?

My MCS pigtail broke where the plastic surrounds the metal connectors. I purchased a new pigtail and wired it in. The MCS will not click, however the engine starts and runs fine. I have a constant SES light.

I tried to pull the trouble codes, but the SES light won't flash anything, not even 12. I went to the store and purchased their OBD I tester thinking that I wasn't making a good connection with my jumper wire. Code 12 wouldn't flash then either.

Could this be a bad ECM?
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Old May 29, 2008 | 10:02 AM
  #2  
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From: Texas
Re: SES Issues, may be bad computer?

what is a mcs pigtail? i am not familiar with this acronym
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Old May 29, 2008 | 11:01 AM
  #3  
jminton's Avatar
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Joined: May 2005
Posts: 143
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From: Willow Spring, NC
Car: 1985 IROC
Engine: 305 4bbl H.O.
Transmission: WC T-5
Axle/Gears: 3.73
Re: SES Issues, may be bad computer?

the connector that connects the mixture control solenoid in the carburator to the wiring harness.
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Old May 29, 2008 | 11:11 AM
  #4  
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From: Texas
Re: SES Issues, may be bad computer?

flashing ses indicats ecm problems ,steady usually indicates sensor or wiring issues, at least this has been what I have found.
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Old May 29, 2008 | 06:56 PM
  #5  
jminton's Avatar
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Joined: May 2005
Posts: 143
Likes: 0
From: Willow Spring, NC
Car: 1985 IROC
Engine: 305 4bbl H.O.
Transmission: WC T-5
Axle/Gears: 3.73
Re: SES Issues, may be bad computer?

No, I mean the SES doesn't even flash 12. It is on steady when jumped at the terminal, or while the engine is running.
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