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Who Turned on the Light?

Q. I have a 1993 Towncar, V-8, A-Trans, & 90,000 miles: I get a check engine light occasionally, if I stop and turn off the engine then restart, it goes out not to come back on again for several days. There is no noise or ruff operation, no excessive oil consumption, this is the executive series with the digital gages. Any help or advice would be appreciated.

Thanks,
Terry

A. I don't think I can be of much help to you in this case. There are many things that could cause the check engine light to come on. The only thing you can do is check the codes stored in the computer. When the light goes on, the trouble code is stored in the computer and even if the fault clears itself, the code is still stored in memory. Most times if the fault is not repeated after a set amount of tome, usually 50 starts, the code will erase.

There is one test you can do. It's what Ford calls the "wiggle test." With the engine running and the light off, have someone sit in the car and wiggle, shake, tug and otherwise move wires around under the hood. If it is a loose connection, the light will go on and you'll have an idea where the problem is.

I wish I could have been more help to you. Let me know what happens.

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