Q: Jeep stalls when driving on bumpy roads

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My 98 Jeep Grand Cherokee has been stalling (and the check engine light flashes then goes away) when driving upon bumpy and uneven roads. It is especially bad when making left turns and encountering bumps, the engine sometimes shuts off. It has also shut off occasionally when shifting from drive to reverse. Ive done some researching and think it could be related to a short in the electrical system or possibly be related to the crankshaft positioning sensor. Could anyone help me identify why it may be stalling while encountering semi rough roads?

My car has 220000 miles.
My car has an automatic transmission.

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