I have 2003 trailblazer and its runing ruff missing when i put it in drive code p103

Code 316 means the engine computer has detected a miss-fire on startup. You normally get a code for the cylinder causing the problem.
If the spark plugs are original, I would start with checking them for signs of damage or excessive wear.

When the engine light blinks it means there is a catalytic converter damaging event happening ! engine misfiring , yes it is bad to drive it , could cause the catalytic converter to have a melt down . You don't want to have to pay a few hundred to a thousand dollars for a new one . There is a code stored in the engine computer telling you what cylinder or cylinders are misfiring ! could be a few things depending on the engine in yours as they can have a few different ones. Coil's , plugs an or plug wires , fuel injectors , fuel pressure regulator , vacuum leaks , are just too name a few ! You best bet is take to the repair shop right away !

P103 Mass or Volume Air flow Circuit High Input P107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Maybe the P103 code trigger the other one, you could try cleaning the MAF sensor. Then put the scanner and erase the codes.
Another trick that sometimes work is to cover half of the tube just bebore the maff with duct tape, that will make the MAF to percieve less flow making the car to work a little better.

Could be just misfiring in one of the cylinders or Runing lean on fuel.

its not dirty fuel, have a repair shop check it that works on Rovers.

it has to relearn the idle it may take about 40mins of driving to do this

Hi you should change the coolant temp sensor this is a white sensor on top of the intake and is part ot the computer system.

its in a relearn right now drive it for awhile in town stop and go traffic good luck

possible tune up

welcome to fixya

plz tel me what year and make of car