But the EGR blocked at idle. Even if it was open, all the exhaust gasses can't fit through that small pipe/valve.
Do you fill the jack at idle? I've never owned one, never used one and haven't read the instructions on the packaging before disposing of thoughtfully. It was something I read in this forum about inflatable jacks and EGR, so I made the assumption that you keep your car in neutral and give it a few revs to fill the bag.
I've been meaning to invest in one, because I'm not going to trust myself with a high-lift jack. I'd rather use a shovel and remove stuff from underneath so I can put the inflatable jack under to get myself out of trouble.
And you know, I'd rather not get myself in THAT much trouble in the first place!