Hyundai xg300 engine dies when cold and sputters

can be a number of problems -have the check engine light scanned most auto stores offer this service for free the code will assist in solving your problem

Well you have fuel injectors instead of a carb.
I would check fuel pressure first. And if the check engine light is on, check the engine computer for trouble codes too.

Sounds like a coolant sensor problem. It signals the ECU for open loop, cold start rich, high idle, until warm up is reached.

it could be the cold start sensor have u checked that the air filter is clean

Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc. To diagnose a 2000 or 2001 1.5L Accent Diagnostic Trouble Code (DTC) P1128 (FUEL SYSTEM LEAN -- PART LOAD), check the following:

• Check the intake system for air leaks.
• Check that the Mass Air Flow (MAF) Sensor (P/N 28164-22610) operation meets the specifications listed below. If the MAF sensor output is significantly lower than the reference value (10% or more), then replace the MAF sensor.

Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (kg/h) 10
21
30
47
RPM IDLE
2000
3000
4000
Table 2: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (g/h) 2.8
6
8.5
12.7
RPM IDLE
2000
3000
4000

WITH MANUAL TRANSMISSION

Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (kg/h) 9.5
19.4
28.8
43
RPM IDLE
2000
3000
4000
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (g/h) 2.5
5.5
8
12
RPM IDLE
2000
3000
4000

May be the fuel pump, experienced similar problems in 1995 Intrepid. When the pump warmed up, it would start to loose pressure and car would sputter and die, but would start back up. If it started it would usually begin sputtering again and eventually die.

Electronic Throttle System codes (P1191 & 1193), Limp Home mode & Low RPM (Detected RPM below 470). This is usually cause by either a sticking throttle plate or an intake air hose leak.

P0136 - O2 Sensor Malfunction (Bank 1, sensor 2), P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2). Either the sensor is broken, it's been unplugged, or the wiring has been damaged.

Check the fuel pressue.

Check the mass air flow meter.

Hyundai grandeur was running fine and now simply wont start. it turns over fine but thats it?

Check the computer on the car it may be programmed to run still on 2 K rpm you need to reprogram the computer on your car.......