Fuel Shut Off Solenoid Problem?

[cheeseman6697]

My Truck shutdown on the Ohio TPK yesterday. Road service diagnosed it to be the fuel shutoff solenoid. They went after parts and replaced it. The Truck runs now....But now when i turn the key off it will keep running for about 10 seconds before it shuts off and i have a check engine warning light....I think he didnt put all of the pieces back in correctly or may of left some out, could that be my problem? The Road service guy wasn't the sharpest knife in the drawer. Any help is appreciated. Thanks