Hi there, I have a 99 VZ V6, 105k, which is misfiring intermittently. It is smooth after startup for about 30 seconds then misfires and idles rough, if I drive for a bit the problem is still there but goes away from time to time when idling. (but never completely!) No error codes or messages at all. Has anyone got any ideas? Would greatly appreciate it. I'm off to check hoses. Thanks!