190e 2.3 16 v idael not right 1.3 all the time

Have it scanned for error code. Idle Air system may foul up. Coolant temperature sensor giving wrong readings will confuse the ECU. It may use 'warm' setting for cold starting, thus fuel would be lean. Ideally it should use 'cold' setting which provides richer air/fuel mixture.

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try changing the ignition module ,,,,but be warned these are a bit on the pricey side ,around 1000€

cold start relay either the fuse in the relay, or the relay itself.

first the a/c issue is probably due to low charge. Need to recharge, if you still had R12 in there you need to have it updated to R134A or find someone who has R12 which is tough.
Starting issues are tough to explain without more info but if you mean your starter doesnt turn the motor I would suggest a new battery as you probably have a weak one or it has a bad cell. If your starter turns but it wont start could be the OVP relay, the cold start vale or any number of ignition parts from the coil to the plugs.

It sounds as if you have a fuel system problem or either the exhaust may be stopped up. Have the fuel pressure checked it should be at or near 30-35 lbs if not you may need to replace the fuel pressure regulator or the fuel pump. Both are common on parts to fail.

When a vehicle has been left for a long time without being started it will need the following: New fuel, New battery, change of engine oil, possibly transmission oil and brake fluid as well. All fluids in the engine will tend to settle and separate out over time if left. Ideally you start the engine weekly if you put a car aside.

hello,location is in top of the engine,right side,standing in front,if you have problem in cold start,check first cold start valve,ty

cold start valve malfunctioning
crank position sensor bad

thats a code for an air fuel metering 02 sensor "a/f sensor" make sure you got the right one in u might have got just an 02 sensor instead of an "a/f sensor" hope this helps also is it a dx ex 6 cyl 4cyl?