On a 91 420sel what is the proceedure to replace the throttle switch that operates when the throttle butterfly valve is fully closed. I know it is on the throttle rod somewhere, but I cant even see the little bugger. I followed the wire leading to it but it disappears deep inside the intake manifold someplace. What has to be removed to get to it? My idle is not under control and this switch reads defective.

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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