hello every one
my car was starting fine no idle issues .then 4 days back i woke up in the morning to start it i saw the rpm at 1.5k and i know it should be at 2k then 1.5k after that should be at 1k so i thought maybe there is some coolant problems so i bleed the radiator and refill it again and still the same problem and my car going crazy if i drive at the first gear and hit 5k until vtec knock out then i stop it i saw the rpm below 1k and still down then drive again slowly and stop my car the rpm at 1k and its make me crazy i don't know what is the problem there is no cel code but smell some carbon or kind of sulfur smell.

my question is .should i check the map sensor or injectors or fuel pump maybe it weak? please help

my English not that much if need another information pls let me know i will post it .

 

maybe someone put suga' in your tank
I would not stress too much as long as your idle is fine overall. Just keep an eye on it for now. You could try using a little bit of a fuel/head cleaner like what LUCAS oil has or something else. Do a fuel filter while your at it as well as those are pretty cheap too. I would just go over all your basic maintenance things first.