I just purchased this 2004 ranger 2 months ago just turned 100.000. I noticed when i bought the truck it was a little slow, But now its just embarassing. there is no check engine light on. but there s no way this truck should run this slow. I shift to second gear it feels like its braking almost takes a good 15 seconds to get to sixty on freeway. Othercars are always wanting to pass if behind me. Its strange though it seems to be quiet and idles good at a standstill. I know there is somethin wrong maybe its simple any ideas plz help

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2004 Ranger Edge, 3.0L Manual. Willz AZ