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			Look at RPM, MAF, ignition timimg, Tra Fra to check for a vacuum leak.  Low MAF reading plus fuel trims in the plus area (2-4) indicate a vacuum. leak.  Take off the oil cap and see how the values change, you should get fuel trims going up, MAF going down.
		 
 
				__________________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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