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Update.
I now know a little bit more about what's going but still don't know the exact cause of the failure.
Firstly, the shop admitted the fuel pump was misdiagnosed.
Second, compression tests showed low compression on the left bank of cylinders.
Third, hand turning the engine, they could feel it tighten & catch, then loosen u again during the rotation.
Fourth, the cam timing is out.
This sounds to them like a bent or stuck open valve, causing the engine to flood with fuel.
They're almost certain that it's not an IMS failure, but still want to drop out the engine the case to investigate. Sounds reasonable I guess, but now I'd rather use another shop, who has better M96 knowledge, to get a second opinion.
What do you guys think?
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