truck is idling at 1200-1300 in neutral and exsaust is reallllll hot, so im thinking it's stuck in regen mode, gas milalage went into the crapper. this started after I decided i had enough of babying it and drove it hard for about 15 minets. funny thing is when you put in drive and step on the brake it idles down to where should be??? prob something to do with lost vacume....hey wait a sec, maybe a vacume hose is off??? cause when i press real hard the brake petal it will go real low, so maybe the booster not getting enough vacume cause of a vacume leak somewhere, who knows this sucks, the nay sayers are prob lovin this, just thought id let u all know....taking in on monday for reflash and whatever. lets hope the find prob, or at least hope for my sake. by the way i tried everything to get it to stop, ie take for another easy ride, shut it down, let it sit for 2 hours....every time i start it it idles back up after about 3 min or so.