redhawks2 Posted September 12, 2004 Share Posted September 12, 2004 Anybody know of a handy place to hook up a vacuum gauge for diagnostic purposes on a '90 LS400? :o Quote Link to comment Share on other sites More sharing options...
VMF Posted September 13, 2004 Share Posted September 13, 2004 for AC? Quote Link to comment Share on other sites More sharing options...
redhawks2 Posted September 13, 2004 Author Share Posted September 13, 2004 I want to check the engine manifold vacuum. As you probably know most V8's draw around 22 inches at idle and the needle remains steady so I want to chek that I don't have a vacuum leak somewhere. Thanks! Quote Link to comment Share on other sites More sharing options...
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