Question about 2000 Toyota Corolla

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High idle when warmed up 2000 toyota corolla

High idle temp guage reading half way no engine light i did get engine light when i unplug map sensor also i wanted to die any suggestions the ect is hard to change and what is the sesor a the end off the head pass side front

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  • mustangsmore Jan 01, 2009

    i already checked vacuum leaks thanks

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  • 26 Answers

May have vacume leak .unpluging map sensor will set a code light.

Posted on Jan 01, 2009

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1 Answer

High idle and no reading on temp gauge


check that there is coolant or fluid in the radiator as a coolant temp sender cannot read air as it is a vital part of the injection system for the ecu to know if the engine is cold and if sender relays no reading it is telling the ecu that it needs to ritchen the fuel mixture (possibally the reason for the fast idle) to get the engine up to normal operating temp as soon as possible.it you live in a really cold climate a thermostat that is jamed in the open position will cause it a long time to reach a warm reading. hopefully it is just the sensor wire off the coolant temp sender and by replacing it will return ever thing to normal

Mar 01, 2014 | Isuzu Pickup Cars & Trucks

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Saturn ls 2000 with v6 engine 26000 miles stalls when driven 3hrs. In 96 weather and idles unstable with air conditioner on it runs Iike it is to hot but temp gauge reads below halfway mark .


try unplugging map sencer, it should be on top side of engine, a black plastic box about 2 inches wide and 3 1/2 inches long, or throttle position sencer could be bad causing engine to idle from high to low. Hope this is some help 2 you.

Sep 07, 2013 | 2000 Saturn SL

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When i start the car it revs up to 2000 rpms or sruggles at around 200 or 300 rpms. After it warms up the problem seems to go away. Their is no check engine light on.


You have a vacume leak, and once the temp sensor starts to read after the warm up the ecm starts to control. I would also check IAC idle air control valve.

Sep 08, 2011 | Toyota Avalon Cars & Trucks

1 Answer

My temp gauge reads only a quarter hot.when i tow a trailer or use my air my temp goes past half and my engine light comes on.


I would supect you actually have two problems going on here. First off it sounds like your guage is reading inaccuratly. When it is reading at one quarter it probably should be at the half way point. This is the normal operating range. The most likely cause is the temp sensor for the guage. When you pull a trailer and engine gets under a load the tempature sounds like its going up too high. Your engine light comes on because it uses a different sensor and is registering accurate tempature. I would start by comparing actual tempature of engine with what the guage reads, this can be done with a scanner or a heat gun pointed at the thermostat housing. I believe you will find a faulty sensor or possibly an outside chance of a bad guage.(but doubt it!)Once that is straightned out you will have to look at why is the engine getting too warm under load. I would start with radiator flow,A ristricted radiator either internally or externally will cause this. Good luck!

Mar 13, 2010 | 2001 GMC Jimmy

1 Answer

I think my temp sensor is bad. Also my timing.


if the motor not overheating,then does the gauge go up a few min. after starting up, if so check temp. sen.unplug it if gauge goes down change it,if not check wiring circuit,for idle pro blem if you dont have check engine light on,could just need tune up,if light is on,check code it will point at problem area.

Mar 10, 2009 | 1992 Toyota Corolla

3 Answers

Temp guage barely moves and runs rough just off idle


Try a full tune up.. get Bosch platnium+4 spark plugs and Acel wires, do the fuel filter and air filter(i suggest K&N) buy some fuel injector cleaner or use Marvel Mystery oil. The ECU could e gone but hard to diagnose if the car needs a tune up.

Jan 18, 2009 | 1992 GMC Sonoma

1 Answer

Engine will not idle cold


Sounds like the computer is not being told the fuel air mixture. Locate the coolant temp switch, usually located at the thermostat housing. should have 2 or 3 pins. try unplugging it and see if it changes the symptom. You can also check the switch with a multi-meter when the reading will change depending on the temp

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1 Answer

Overheating engine: termo guage at the middle during idle


The Temp gauge should read in the middle of the gauge at operating temperature. This is normal. The radiator fan should come on after idling (not driving) for 20 minutes. The fan should also come on when you turn on the AC. Are you experiencing overheat problems?
Please reply if you have overheating issues.

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