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Old 01-25-2006, 05:41 PM   #1
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Default Case lean information

So today @ work one of the mechanics put in my injectors while I was back in the machine shop taking care of my work. But anyway when he was done I got talking to him and asked if our shop had anything that could perform a case lean on my car. He didn't even know what a case lean was nor had ever heard about it. So I explained it to him (as best as I could ) and he asked if I could possibly dig up something for him to read up on this case lean procedure. So if anyone can point me to a detailed explanation of what it is or give me a good one that'd be great.


Also those injectors seemed to rid me of my missfire But I'll give it a few days just to make sure; motor feels much smoother now too

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Old 01-25-2006, 05:53 PM   #2
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so do you want to fill me in on what a case lean is??
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Old 01-25-2006, 06:18 PM   #3
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IIRC a case learn is a Crank varaition learn sequence... This should be done any time the PCM is replaced, the crank sensor has been replaced... PCM has been removed and the crank position disturbed...

Again thats IIRC


I think thats for 97 and later bonnevilles, possibly 98 and later... I forget

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Old 01-25-2006, 07:07 PM   #4
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Old 01-25-2006, 08:59 PM   #5
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Case learn procedure

Borrowed from ClubGP...

Hope this helps you and your mechanic
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