For Chrysler PT Cruiser 2.4L 2429CC 148Cu. l4 GAS DOHC Naturally Aspirated 2003-2010. >> Smooth & Stable Idle Speed: Ensure your engine runs smoothly without fluctuating RPM or stalling. >> The idle valve ensures quicker ignition and more stable rpm at start-up, reduces starting hesitation and prevents "stalls" in icy or cold conditions.