Volkswagen: 98 vw 2.0 jetta gl model cold start problem, coolant temperature sensor, intake air temperature sensor

Question
Every morning I have a hard time starting the car,after a few turns on the ignition swith and pumps on the pedal of the gas the car will start. Then throughout the day the car will start easily with no problems. It only happens in the morning when the car is cold. I have looked at the hayness repair manual for 98 vw jettas. Suggestions for cold start promblems are replacing the coolant temperature sensor or intake air temperature sensor. I have check battery,fuel system,ignition,they seem ok. I would really appreciate if you have any other answers for this problem. thank you.

Answer
Hi Jerry,

Fortunately 90% of the time this is a coolant temperature sensor that is faulty.

First, check the contacts to the sensor and make sure the terminals are all clean and shiny.  If the contacts look good,  replace the sensor.

This should solve your problem.  The intake air sensor is generally a reliable part and rarely fails in the cold starting area.

Ron