Question about 2001 Mitsubishi Eclipse

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2001 Mitsubishi Eclipse GT Overheating problem (3.0, v6, 24v) When I'm idling (after the car has heated up fully) the temperature gauge will slowly rise to near the top then a fan will kick on and it will slowly cool back down. If I rev the engine it will start to go down also. I don't have to rev very high, I can even have it hover around 1500 RPM and it stays steady in the middle, where I assume it's supposed to be. The service manual suggests checking the radiator cap pressure, thermostat, radiator clogging, and fan switches. Don't even know where to begin. Any advice?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

dustyboner
  • 331 Answers

SOURCE: my obd2 is showing me a code p0118 engine coolant temperature circut high input

d220d27.jpg this is the coolant temp sensor, it sends a signal to the engine ECU
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d9e2deb.jpg
this is the temp sending unit. it sends a signal to the gauge on the instrument panel.
this is what you need to get to fix your temp gauge.

Posted on Oct 15, 2008

  • 221 Answers

SOURCE: Is there a cooling fan fuse?

Hello, Yes there are fuses for cooling fans there also should be a relay or relay's, most vehicles locate them under the hood in the power distribution box, it sounds like there may be a problem with your cooling system that may need some troubleshooting, here's a list of things that might help,

  • Check the thermostat, if it's defective replace it.
  • Check the coolant in the reservoir tank, it should be at the proper full level.
  • Sometimes when you change a thermostat there's a possibility you could get air in your coolant lines from having the coolant system opened up, this could keep your coolant from circulating through your system, if so you would need to bleed the air out of the coolant system.
  • The water pump should be inspected for leaking coolant out of the weep hole's, when a water pump go'es bad it may leak coolant, which would mean the seals on the pump are bad, also listen for squeeling noise's coming from the pump when the car is started, if it squeels the bearings are bad, there is also a possibility the water pump fins are wore down from corrosion, there is no way to inspect this without removing the pump.
  • check the drive belt for wear and tension, a bad tensioner or a bad drivebelt could have an effect on the operation of the water pump.
  • check the pressure cap on the coolant reservoir tank for good pressure, when you remove the cap you should hear a hissing sound this means you have good pressure in your cooling system, check for corrosion or build up on the cap, clean the cap if nessary, also check the coolant in the reservoir tank, it should be clean, if not you might need to have the cooling system flushed.
  • check the large upper and lower radiator hose's for cracks, swelling, and proper coolant flow.
  • Check the operation of the cooling Fan, and circuit, cooling fans use relays and fuses, some vehicles use more than one cooling fan, if your vehicle has two cooling fans there should be two relays and two fuses one for each fan, first visually inspect the fuses if one or both are bad replace them, you can test the relay or relays for continuity by removing them and doing a proper continuity test according to your relays circuit diagram.
  • Check the coolant temperature sensor, most coolant temperature sensors are located directly in the thermostat housing, this sends information to your ecm which determines when to turn your cooling fan on and off, if it's defective replace it.
  • Inspect the radiator grill for any debris build up or damage.

Posted on Mar 29, 2009

  • 64 Answers

SOURCE: I had the radiator and thermostat changed

when you had the thermastat replaced the might have put a higher temp one in and that will make it seem like it's running hot you might have to put a lower temp one in

Posted on Jun 09, 2009

  • 3 Answers

SOURCE: 2001 mitsubishi eclipe heater does

It could be very well your water pump from the sounds of it. When was the last time you had that check or replaced? That would be my next guess to the problem...what's your mileage on the car?

Posted on Jan 02, 2009

  • 218 Answers

SOURCE: Replaced battery on a 1992 Mitsubishi eclipse, still needs jump

THE HIGH LOW IDLE MAY BE A SIGN OF A LOW COOLANT LEVEL.THE IDLE CIRCUIT IS CONTROLED BY ENGINE TEMP.AS FAR AS THE BATTERY.THE STARTER MAY BE DRAWING TO MANY AMPS.THERE MAY BE A DRAIN ON THE ELECTRICAL SYSTEM W/THE KEY OUT.

Posted on May 01, 2009

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