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2000 sunfire heating problem


ias_rick
11-23-2004, 10:17 AM
00 sunfire was overheating so I changed the thermostate and now it barely heats up when driving and at a stop it heats to normal temp then goes down once it stsrts moving. It has the 2.2L in it

FormulaLT1
11-23-2004, 02:46 PM
Might be a faulty coolant Temp sensor.

hotbug1776
11-23-2004, 04:00 PM
that's the way they run, my 2.2L (when I had it) ran cold as well unless it sat. I changed the thermostat to try to correct the issue, but it still ran the same way, so I didn't mess with it any more.

intimidatorjr20
12-01-2004, 11:01 PM
If you change the thermostat, be sure to use a GM part, as the aftermarket t-stats have a weak spring, which lets it open even though the vehicle is not up to temperature. My wife's car had the same problem. Hope this helps.

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