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Old 08-15-2009, 01:28 PM   #1
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2000 focus zx3 ac/overheat engine

Please Help!!
I have replaced the water pump, thermostat, both fans, heat sensor between the fans. Should I have a low speed fan at idle without the a/c on? I push in my mile meter and hold it while I'm starting the engine and I push it 10 time which takes me to my celsius temp and it always overheats at 109-111. Could someone please help me with this issue?[dunno
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Old 08-15-2009, 01:41 PM   #2
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I'm assuming you've replaced ur coolant? how high is it in the resevoir. are you haveing problems w/ any other of ur accessories?
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Old 08-15-2009, 01:55 PM   #3
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I replaced the coolant. the resevoir was filled to the max but, today I have it between max and min. I have not other issues with accessories. I replace the thermostat with one from the local ford dealer and it works..open and close.
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Old 08-15-2009, 02:24 PM   #4
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This thread should be moved to Tech Chat because it's about maintenance.

How many times did you overheat before? Are the fans on when you're overheated? When the temps reach that height, you should be able to shut the engine off, then turn the key to ON, and the fans should run. If not, it could be the fan relay that is the problem, but I wouldn't think the fans would come on with the AC if that was the problem- and each fan has it's own relay.

I'm thinking you've overheated it too many times, but we can go through the fan wiring to see if there's a problem in there.

I'd also recommend removing the spark plugs to see if there is evidence of overheating in the spark plugs. You'll be looking for cracked porcelain insulators, and red deposits on the plugs. Without these red deposits or cracked insulators- or any other signs that the engine is overheating besides the temp gauge: ie, higher idle, sputtering, and more noise from the engine- it makes me wonder if the cylinder head temperature sensor is operating correctly. That's what reads the temperature for the gauge and the ECU. There is no heat sensor between the fans, that's the fan resistor which regulates the speed of the primary fan.
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Old 04-04-2011, 09:30 PM   #5
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2000 for focus zx3 konda edition 5 speed need help

well i just bought me a focus the problem i have is the temperture in side goes into heating mode but thats when either im in nuetral not driving or i got the a/c on and im stoped completely, i installed a new thermostat i took to get smoged it was setting there quiet check the temperter guage and it was on red fans work fine once the guy hoped into the car it went down and once i started to run it went back to normal im thinking it maybe a sensor or something there no leakage of anything some told me cheak for oil leaks i check motor is clean what was told to me was that the heater core was bad but they bypassed it but no leaks either so if there is someone out there that can help me i appreciate it, its my first focus im more of a civic guy but my thing is civic are played out so if anyone knows about this please respond back thanks
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