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Re: Thermostat replacement kinda helped idle problem... Posted by Saana88 [Email] ![]() ![]() ![]() In Reply to: Thermostat replacement kinda helped idle problem..., Joonyerr, Fri, 3 Mar 2006 19:30:45 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I thought hunting idle before warm-up was a sign of a failed/faulty engine temperature sensor. Did you check the resistance of that one first?
Does your thermoswitch turn the fans on? If so, do they stay on until the engine cools down? The radiator is leaking on my '92 and the coolant temperature would spike a bit in the summer, but it's nothing a properly-operating fan setup can't handle (it's slated for replacement in May).
A three-way thermostat has a bypass hole (usually filled with a floating pin) that allows some coolant to bypass the thermostat, I think. I know the Saab thermostats have to be designed to allow air bubbles through while you are refilling and bleeding the cooling system.
You did bleed the cooling system as you refilled it, right? Otherwise, there's your overheating problem right there.
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