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Old 24-03-2014, 10:43 PM
DCCD Donut Driver
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Dscott at standard level
Default What would cause this!?

Melted valves... Two valve heads were sitting on top of the piston melted and disfigured.. These were Supertech valves as well. Motor is an EJ207 with EJ20K heads.

I am pretty sure my o2 is on its way out, reads 0.06v when cold and 0.00v when driving some times..

Anyways... I was trying to diagnose a misfire at 2500~300 and yeah i was planning to buy an o2 sensor that weekend and this just happened...pics tell the story I guess. i am heart broken.

It was appox 2500~3000rpm, light throttle, cruising..2nd or 3rd gear.

Would others agree a faulty o2 sensor the most likely cause? The car is tuned using powerfc.

This thread had the exact same thing happen!

Car died and will not turn on. - Page 3 - Subaru Impreza WRX STI Forums: IWSTI.com

I need some expert feedback








Last edited by Dscott; 24-03-2014 at 10:45 PM.
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