Why won't 22re won't idle or run under 3000 rpm?

A 22RE engine that won't idle or run under 3000 RPM could be experiencing several issues, including a clogged fuel filter, malfunctioning fuel pump, or a vacuum leak that disrupts the air-fuel mixture. Additionally, problems with the ignition system, such as worn spark plugs or a faulty ignition coil, can also cause poor performance. Lastly, a dirty or malfunctioning idle air control valve (IAC) could be preventing the engine from maintaining proper idle speed. It's essential to diagnose the specific cause to resolve the issue effectively.