Toyota Repair: 1991 4runner intermittent starting problems, coolant temperature sensor, coolant temp

Question
QUESTION: my 1991 6 cyl 4 runner has starting problems and can happen at any time. it will start with starter fluid and runs fine it is not the cold start injector as this works fine

ANSWER: Grant,
Cold start injectors only work when the engine is cold. I've never seen one bad on a Toyota. Anyway sounds like a coolant temp sensor on the engine. They send goofy signals to the computer when their bad. They get gunked up and cause starting problems when engine is cold or warm, their easy to check with an ohmmeter,(resistance hot and cold).

Good Luck

---------- FOLLOW-UP ----------

QUESTION: where do i find it and what range am i looking for on the multimeter

Answer
Grant,
The coolant temperature sensor is on the water bypass outlet next to the cold start injector. When the engine is cold the resistance will be in the 20k range, when the engine is hot it will be in the 0 to 1k range. See Haynes manual #92075 page4-11.