On reflection, a leakdown or smoke test will only tell me if the cylinders are leaking. Neither test will help me understand if there is a valve timing issue. I think for that I'm gonna need a pressure transducer in the spark plug port connected to a good scope. Only by comparison with bank 2 will I know if the engine has a breathing issue.
I did wonder if an exhaust restriction could have something to do with this but at a cranking speed of only 120rpm it would have to be one hell of a restriction.
Something seems to be affecting the volumetric efficacy of bank 1.
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Audi S8 D2 2002 88k mls
Ebony pearl effect black. Grey interior.
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24th July 2023, 08:29 PM
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