Question about 1996 Mercury Sable

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My Idle will not come down right away when driving, also when I put it in park the Idle goes up

It started when I changed the serpintine belt

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Check the routing of the belt and double-check the functions the belt drives. Most engines will idle higher when in park (or neutral) than when it drive because of the lack of load on the engine. Most engines will also idle more quickly until the engine is aware that it is warmed up. And many engines will idle faster when the alternator output seems to be insufficient. Trouble with the oil pump, water pump, or alternator will cause these functions to fail or just fail to detect properly. Grease accidents on the drive wheels the serpentine belt passes over can also cause the same symptoms, especially if you have one device drive wheel that is on one side of the SB while the others are on the other side. Inspect the operation of the belt and the driven devices while the car is running (please keep fingers, hair, and ties out of moving parts).

Posted on Mar 28, 2014

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Is the engine reaching its proper operating temperater or 185-195F

Posted on Mar 28, 2014


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