the SVX's knock sensors will go bad over time -- usually mileage approaching 180k miles. Their casings will crack and the harness lead will get brittle and crack. By not replacing them, you're letting them tell the engine to pull back timing that, most likely, doesn't need to be pulled back - thus hurting engine performance.
-Bill
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Retired NASA Rocket Scientist
Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023
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'92 Fully caged, 5 speed, waiting for its fully built EG33
'92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension
'92(?) Laguna, 6 spd and other stuff (still at OT's place)
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