C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

bad ecm or what

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Old Dec 11, 2002 | 11:42 PM
  #1  
vettered85's Avatar
vettered85
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From: austin tx
Default bad ecm or what

i can not get any codes pulled from my ecm , when i ground a and b terminal i get overdrive light on, how do you check if ecm is bad, car is not running currently, low fuel pressure well change pressure regulator when have time as suggested by a forum helper
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Old Dec 12, 2002 | 02:26 AM
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Default Re: bad ecm or what (vettered85)

Not even a 12?
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Old Dec 12, 2002 | 04:29 PM
  #3  
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From: Norcross GA
Default Re: bad ecm or what (drive it)

When jumping A->B, all the relay's should energize,...... you should hear plenty of clicks, as well as the fan, and fuel pump power up. Check Engien light should come on.

We are talking about an 85, w/ 870 EMC, right?

I'd suspect wiring, fuses,....
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Old Dec 12, 2002 | 05:53 PM
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From: Latham NY
Default Re: bad ecm or what (vettered85)

Is the check engine bulb burnt-out? It should light when the key is turned on but not started.
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Old Dec 13, 2002 | 08:33 AM
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Default Re: bad ecm or what (Bluevette85)

How's the battery holding up?
That battery light should be on when the key is in the on position as well without the car running.
Hate to ask, but are you sure you did the currect pins?
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