I have a daewoo lanos model 2000. Every time it gets hot it runs rough and surging. I changed the fuel injector, fuel pump, spark plug, spark plug cable wire, and ignition coil but still did not solve the problem. I send it to shop to check for computer but they did not find the cause. Four mechanics have different findings. Is there anybody out there who have the same experience and how did they solve the problem. Thanks..Car surge while running every time it gets hot?
Since this seems to be a temperature related problem, changing stuff like the fuel pump etc is not going to solve it.
Try changing (or testing first) the coolant temperature sensor. This relays information to the ECU which then adjusts fuelling / ignition accordingly for the engine's temperature
