Alain V. you're right it is my smog pump bearing, I manually disengaged it on startup an the noise stoped, enganging it brought back the noise. Mattsuzie try doing the same thing, there is only one electrical wire that comes out of the smog pump clutch, the connector is on the suspension post in the engine bay. Thanks so much Alain!

Mihai

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1988 420sel
1973 porsche 914 2.0