How to diagnose and fix a broken acceleration pedal in an Audi 80?

I have an older Audi 80 and recently the acceleration pedal has started to become stiff and unresponsive. I'm worried it may be a serious issue and need help figuring out how to diagnose and fix it.

First, try checking the pedal itself for any signs of wear or damage. If it appears to be in good condition, then the problem may lie within the pedal assembly or the throttle system. For a more accurate diagnosis, it is best to bring your vehicle to a certified Audi mechanic.

This could be caused by a variety of issues, such as a faulty throttle position sensor or a clogged air filter. It's important to address the issue as soon as possible to avoid further damage to your vehicle. Consider taking it to a professional for a thorough inspection.