ias_rick

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

Might be a faulty coolant Temp sensor.

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RIP Hypsi - I just want to express I will never be the same after having lost such a good friend. You meant alot to me and I feel I am a better person for having known you. Til the day we meet again my friend you will always be in my heart.


Mods: Weight reduction (I don't wear underwear)

hotbug1776

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.

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intimidatorjr20

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.