1999 xj8 idles but won't accelerate what should I look for?

If your 1999 XJ8 idles but won't accelerate, start by checking for issues with the throttle body or accelerator pedal position sensor, as these can affect acceleration. Additionally, inspect the air intake system for blockages or leaks, and ensure the fuel system is functioning properly, including the fuel pump and fuel filter. It’s also a good idea to scan for any diagnostic trouble codes (DTCs) that may indicate specific problems. Lastly, consider checking the Transmission Fluid level and condition, as transmission issues can also cause acceleration problems.