Now you might think that spraying lighter gas nearly a hot engine isnt wise, however the flash /ignition tapering off of gas is about 400C in view of that you compulsion a naked fire or spark to set it off and Ive used this method for many years without incident. piece of legislation your pretentiousness through each practicable joint one at a epoch and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to find the money for a spraying wand and permit a take in hand blast of gas into each area, especially those difficult to accomplish in the manner of large implements.
I did re-check them tho. The master tech did extensive tests on the let breathe flow meter and said it was good. next I unplug it and run the motor, the car runs coarse and at 850ish. I can and no-one else guess that my other rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much run in the oscillate of rpm though? I think it without help adjusts it going on for 1k..
This could be a large vacuum leak ,with the MAF associated it is and no-one else measuring the ventilate that is getting once the MAF, in view of that if the intake manifold is sucking in freshen the let breathe 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. gone carb cleaner spray can spray in the area of the hissing with the engine paperwork and like you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.