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Old 12-11-2008, 06:07 PM   #1
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Default Random overheating and dipped idle.

As the title states it randomly overheats for about 15 seconds while the idle dips and it hesitates a bit. The idle dips then goes back up and repeat. Gotten this twice lately and only happens once per day when I first take it out. Whats got my confused is I just replaced the thermostat and my coolant is topped up in the radiator and in the tank. This is a first and quite frankly it's pissin me off. Anyone got any insight to this bullshit?
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Old 12-11-2008, 07:59 PM   #2
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cleanse the radiator...of its sins.
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Old 12-11-2008, 09:53 PM   #3
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Quote:
Originally Posted by hustler View Post
cleanse the radiator...of its sins.
You really think that is what's causing it? I'd be pretty happy if that's all it was.
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Old 12-12-2008, 05:47 AM   #4
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dude, just pick up the Prestone cooling system cleaner for $8 or whatever it costs and follow the directions! Worked like a dream on an 87 Blazer I fixed this summer.
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Old 12-12-2008, 09:48 AM   #5
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I shook half a quarry of minerals out of my radiator from the green car when I swapped it for the new one.

If the thermostat works, there are no leaks, and the waterpump works, then you have an obstruction somewhere. Distilled water only! Its pretty much the only miata.net-ism I support.
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Old 12-12-2008, 04:46 PM   #6
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Nuff said. I'll let you guys know if anything substantial falls out.
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Old 12-12-2008, 07:17 PM   #7
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Hey, if its an old rad, and you've run groundwater through it, you might have an obstruction.
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Old 12-17-2008, 04:42 PM   #8
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Complete bullshit. Flushed it and it's still overheating. What's next?
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