Probably not this but I'll mention it - I've had trouble with floor mats getting in the way of the accelerator pedals before. (It sure makes you feel a bit daft when you discover that!)

At the other end of the throttle there will be a spring and a rotating shaft. Make sure that is well oiled. Disconnect the cable and see how that feels. Mechanical connections running from the throttle assembly need to be considered such as say cruise control if that's the case.

Is this still CIS? Around 1993 things started to get more modern with EFI and wasted spark etc...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!