My Saturn starts fine in the morning. After it has been turned off, every time I turn it on for the rest of the day, the engine turns over but I have to hold to gas for it to catch. I checked the spark plugs, and they seem fine, so my dad thinks it is the sensors messing up. Any suggestions?
Edited by: Jbach63

 

Engine Coolant Temperature Sensor (ECTS). There two on the drivers side of the cylinder head. Its the lower one with the two wire connector.

After the engine warms up, the bad sensor still thinks the engine is cold. So the PCM keeps dumping fuel to richen the mixture and warm up the engine. Since the engine is already at operating temperature, its running too rich and flooding the engine.

Holding the pedal to the floor whle starting puts it into "clear flood mode". It basically shuts off the injectors.