hsiehd

My 93 ES300 can not start without add gas that also no idling after start.
I need keep add little gas to keep idling and can drive it as normal expect no idling.
The car will have high idling or regular idling after long drive in some time, but that will keep around 10~20 mins then come back original problem.
I already change IAC Valve, EGR and check vacuum hoses.

Please advice what part I also need check since the problem still not solve,
Did that will be spark plug, spark plug wire, rotor or fuel filiter problem?


Please help.

hzt30

Check your coolant temperature sensor. Also, check your TPS sensor.

hsiehd

Which coolant temperature sensor I need check since one locate at back of front of engine block also between both engine cover, one locate at water outlet, and one locate at between both engine cover (close to driver side, also call engine coolant temperature sensor)?

Please advice

Thanks help

David

hzt30

The engine coolant temperature sensor is the one with two wires attached to it. This is the sensor that tells the computer what the temp is. If you unplug this sensor with engine on, it will turn on the check engine light. There is another coolant sensor with one wire, this if for the temp gauge.