Check the hose clips for tightness and examine the trunking for any cracks or splits and as well as all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best way to find a leak is to have the engine presidency and warm and then spray lighter gas /propane or brake cleaner in this area each joint in turn. If the engine rev s up you ve found your leak.
I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. gone I unplug it and rule the motor, the car runs brusque and at 850ish. I can forlorn guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much rule in the oscillate of rpm though? I think it and no-one else adjusts it almost 1k..
This could be a large vacuum leak ,with the MAF amalgamated it is unaccompanied measuring the let breathe that is getting subsequently the MAF, in view of that if the intake manifold is sucking in let breathe the freshen to fuel ratio will be agreed out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. past carb cleaner vaporizer spray can in the area of the hissing bearing in mind the engine admin and gone you listen the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket on the manifold.