1997 Toyota Corolla 4 cyl Front Wheel Drive Automatic 115000 miles
I changed the spark plugs in the car just as I have done before. I start the car and the engine knocks.
I think that maybe something was wrong with the new plugs so I put the old ones back in. The knock stays.
It is an overhead problem as it increases with RPM.
I checked the oil and its not low, although it could probably use a change (its my grandmas). The knock goes away when the car warmed up. I parked it to listen some more. I revved the car to 4k and it was fine.
I let the RPM's drop and it was ok for a few seconds. Then the car kind of choked and the rpms seemed to fluctuate low. The knock began again. I gassed it a little and the knock stayed.
Saturday, March 20th, 2010 AT 6:16 PM