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

Error 51 'Bad EPROM' 87 L98 - Help

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Old Sep 26, 2003 | 02:37 PM
  #1  
vinnies87's Avatar
vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default Error 51 'Bad EPROM' 87 L98 - Help

Well, was intermittently just shutting down (87 L98) not often and then would restart after about 3-5 minutes and run just fine... well check codes and only code was 51 so ordered and installed new ERPOM yesterday, drove all day, no issues, then this morning...
Temp 198 running fine, and 'Check Engine Lite' come on, car still running, stays on for about 15 sec then goes away... get home and check codes and ONLY code AGAIN is '51'. Made sure connections were tight and reseated EPROM.
? - Thinking maybe just bad ECM ? Any thoughts there guys....
vinnie
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Old Sep 26, 2003 | 04:47 PM
  #2  
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From: Woodstock GA
Default Re: Error 51 'Bad EPROM' 87 L98 - Help (vinnies87)

Sounds like a bad ECM, it's one of many codes that set when an ECM has internal problems.

David Fulcher
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Old Sep 26, 2003 | 04:56 PM
  #3  
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vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default Re: Error 51 'Bad EPROM' 87 L98 - Help (David-F)

Thanks David,,, yea just took the least expensive part first, EPROM - now guess its replace the ECM, not too bad at NAPA $85 after core replacement... so on we go... thanks again.
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Old Sep 26, 2003 | 07:15 PM
  #4  
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From: Looks like I picked the wrong week to stop sniffin glue Orlando
Default Re: Error 51 'Bad EPROM' 87 L98 - Help (vinnies87)

I had a similar problem with my 90. Got a code 51, thought it was perfect time for an Ed Write chip, about a year later the ECM went bad. Guess they like to die together.
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Old Sep 27, 2003 | 01:14 AM
  #5  
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vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default Re: Error 51 'Bad EPROM' 87 L98 - Help (vinnies87)

Well went to napa and got a NEW ECM and installed with NEW stock EPROM. Install went well and took pics in case anyone wants the process.. Ran test and NO 'Code 51' or ANY codes... so we'll see. thanks for the help, guys.
vinnie
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