Skipping 3-4 times on 2005 Ford Expedition

I had noticed before a skip going up small hill 3 or 4 times. I just recently had to get a new transmission. This was a problem before I got new transmission also. What would cause this? We also replaced the throttle body.

by in Birmingham, AL on March 31, 2013
1 answer
ANSWER by on March 31, 2013
Coil breaking down! Scan test needed to find which coil as there are eight total.

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