There were some 1.8 Toyota engines that did this back in about 2000-2002,typically in the MR2 There was no cure, only prevention by owners stripping out the guts of the precat so that the internal bits that would break up were not there any more to so do.After 2003 Toyota changed something to prevent this happening
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1986 924S bought new. Now used for AutoX and street.
Chipped, throttle cam, highflow filter in original airbox/snorkel, 14mm rear sway
Hyundai Ioniq hybrid daily driver
Vindicator Vulcan V8 spyder, street legal sports racing car
(300hp,1400 lbs kerb weight) used for sprints on circuits, and hillclimbs
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