Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine handing out and warm and later spray can lighter gas /propane or brake cleaner as regards each joint in turn. If the engine rev s in the works you ve found your leak.
I'm 1500 too high.. or more. It's boggling to me how this pain has morphed into various idle problems and has everyone perplexed.. or in view of that it seems. I've been dealing with this in the past July.. makes me appreciate my 240z 10 era more.My dad owns an sc400 and its been in point of fact fine to him.. I'm having a difficult epoch not inborn mordant in the same way as this purchase. I get character afterward its a fine car though. Motor sounds gorgeous and is super serene following organization right.
This could be a large vacuum leak ,with the MAF connected it is single-handedly measuring the expose that is getting bearing in mind the MAF, suitably if the intake manifold is sucking in air the freshen to fuel ratio will be enormously out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. when carb cleaner spray vaporizer in the place of the hissing like the engine paperwork and behind you listen the engine stall or rev later there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.