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Rough Idle in S90 S90-V90 1998

One other thing you can do is swap the Power Stages. There two on this engine, one for the cyls. 1-3 and the second for 4-6. There is one on each side of the bulbous part of the lower intake manifold. You could swap them and see if the problem moves to cyl.#2 from #5. I have heard cases where a bad power stage can be responsible for only 1 dead ignition pulse.

DEWFPO
--
1998 S90 067,100 and 1995 964 150,850






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