Sai problems also cause vacuum leaks that can lead to rough running. Check the maf flow and the fuel trims. If the maf flow is low and tbe fuel trims are high on the plus side then good chance its a vacuum leak.
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Current car
2000 Boxster 2.7l red/black
Previous cars
1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
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