Won't stay running once warm

[Ransom]

Started having this problem yesterday...car starts fine when its cold but once it warms up it begins to idle funny like it wants to shut off then eventually it won't stay on, it starts right back up but if I take foot off the gas it just dies right back out....

[jlevie]

Replace the O2 sensor, adjust the valves, and have a smoke test run and fix the leaks it reveals. If the problem persists, replace the ECT sensor.