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Hi all,

I post mostly on bimmerforums (been there a long time), started this same thread there last night. That one will probably get updated the most.

Here's the link with pics and vids:
Leonator134's E39 M5 Journal

I did have a specific question/situation for you all..

Car threw a CEL/SES light as I pulled into the driveway from the 3.5hr ride home. Pulled the code now, p0492. Secondary pump. I have maintenance records as seen in the bfc thread that the SAP has been overhauled.

I've also been noticing a squeak under load which I have come to realize is pre detonation.

Any thoughts on this guys? Thanks much,
Leo
 

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P0492 isn't the pump, it's low flow, a very common and difficult-to-fix problem on E39 M5's. The BMW code is AA. There are hundred's of thread on this so do a search.

And I have never heard detonation described as a squeak before. You'll get better help if you post a sound clip.

Malcolm
 

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Welcome here Leo. Do a search and you will see a number of threads about that SAP / Flow issue on the S62, especially the early ones. Good luck.
 
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