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Fixed it! The PROM chip in the computer was not getting a good connection. The previous owner spent $1000 to fix it, I guess he took it to the wrong shop?!

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Q: Your 91 Buick wont go into dignostic mode Is this an ecm problem I know there are codes to read but it should still give me a code 12 either way I think its in limp home mode but I cant get a code?
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