1983zxt with cold engine it starts fine and idles properly. after warm-up when i restartcar it dies and won't idle. after giving it gas to keep running,after a short time it idles fine. any solutions? also i have hydrolic lifter or two that stick when engine cold. noise goes away in a few seconds when oil presure rises.have put additives in oil to help correct problem but nothing yet.what is my next step.