Intermittant hi idle could be caused by an improperly adjusted throttle body switch which commands the idle control system to engage when your foot is off the gas. Check the contact closure resistance of this switch and be sure it closes when the throttle is fully closed.
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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
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