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check engine light


BUBBA 1's Avatar
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11-29-02, 04:55 PM   #1  
BUBBA 1
check engine light

OWN 1996 T BIRD 3.8 ENGINE THE CHECK ENGINE LIGHT CAME ON AFTER CHECKING THE ON BOARD COMPUTERTHE TROUBLE CODE CAME BACK RIGHT BANK RUNNING TO RICH.WHAT IS THIS?HOW DO I FIX THIS SINCE THE FORD DEALERSHIPS I HAD IT TO HAS NO IDEA????????

 
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11-29-02, 05:27 PM   #2  
davidf
check the air filter and change if needed,If engine is overcooling , it will cause computer to squirt more quantities of fuel like a cold start situation.How is the temp guage reading?Check the connections on the temperature sensor. The temp. sensor is on the thermostat housing and is copper colored..Check for a bent or dirty connector contact and check for a broken wire there.That sensor is the major cause of the computer giving a rich mixture because if it goes bad then it gives a wrong voltage to the computer which the computer may interpret as a cold antifreeze when the engine is hot and therefore command a richer mixture because it thinks it is a cold engine start.Cold antifreeze gives 0 volts across the two wires and hot engine 5 volts.These are the voltages the computer interprets as cold or hot engine.


Last edited by davidf; 11-29-02 at 06:11 PM.
 
Joe_F's Avatar
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11-29-02, 07:57 PM   #3  
Joe_F
Bring the car to any Autozone and they will scan the codes for free for you.

 
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