ok my car idles at 800rpm but when i driving and stop at a light or just stop the idle drops low like at 300-400rpm then it sometime turns off but most of the time it picks up to 800rpm again....weird ****....help me please

 

That is weird. The engine will cut off around 400 RPMS anyway.

Check your TPS.

 

Hi Iv had similar problem with my H22A2 even check engine lights in dashboard was on .first time when Iv spoted that light I was doing 120 Mph on fifth and later it happened even at 40Mph. at 3000 and above on 3rd and especialy 4th gear
very often after braking before traffic lights .so I checked codes . engine code sugested MAP Sensor and exhaust gas recilculation EGR valve lift sensor
Co2 lambda sensor was on my mind as well so I bought it NGK NTK for 105 pounds
finaly .In my case it was poor quality petrol from supermarket Tesco.
change petrol station dont mix new petrol with half tank of older petrol better wait till empty as much as possible . good luck
and sorry for my english