A few months back, I posted a problem with my '01 prius: engine knocking for @30 sec when first starting up. Does NOT happen on first start of day, only on subsequent ones. Random misfires not corrected by changing coils/plug. It's been in the shop for awhile, and no diagnosis. I'm ready to sell the thing, unless there is a quick fix. New hybrid battery 20# miles ago; used transaxle 10# miles ago (with 1.5 yrs left on 2 yr warranty); new tires 10 miles ago. Any suggestions as to the problem or any takers interested in purchasing? Has 185,000 miles. In the Bay area.
The fact that the knock is temporary and only on warm starts makes me think there is still some solution but I don't know it . So it is known they are misfires causing the knocks? Link to your prior post for prior suggestions. Start-up engine knock; disappears after 30 sec | PriusChat
