Why does my 1988 ford f150 engine speed surge no matter how much gas you give it?

this all started after i had a guy that had been a mechanic for 30+ years to clean my throttle body with some CRC throttle body and air intake cleaner, it wasnt surging like that before he cleaned it but it would miss when the engine got up to operating temperature and it would almost shake you off of the road it would jerk so bad, that didnt solve the probelm i had before but a new ignition control module did, but ever since he cleaned the throttle body it surges up and down when you're giving it constant gas, doesn't matter if it's in park or you're driving it, I was just wondering if there might be something he did wrong or over looked that might be a simple fix?

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