You have a number of small vacuum leaks. Check all of the rubber components on the engine such as; aux air hoses, injector holder O rings, vacuum lines, intake manifold seals - anything that seals air out of the intake system - a long list of things to check.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k