Question about 1992 Pontiac Bonneville
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Posted on Jan 02, 2017
It sounds like your fans and sensors are workong like they should. The sensors work on temperature and should signal your fans to turn on between 109 and 200. They will stay running until the temperature drops back to that temp. You need to find out why your engine is runing warm, 210 is too high as a running temp. Make sure the cooling system isn't low on coolant first. If you still have the original radiator, it might be a good idea to have it flushed to clean out accumulated corrosion and **** . A "reverse flush" is the best. Your thermostat may be sticking if it's original.It has to come out for a reverse flush so make sure they replace it if you do that. It could be a collapsed hose. None of these things are overly expensive to repair but should be considered. I would try these first. Hope this helps.
Posted on Sep 12, 2009
I would check to see if the spark plugs are fouled. Or you might have a bad ignition control module (mounted under the coil packs). Auto Zone can test the ignition control module.
Posted on May 19, 2010
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