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Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

what causes misfires?

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Old 09-07-2003, 12:59 AM
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Angry what causes misfires?
i was drivng home today after and uppipe and downpipe install and my check engine light started blinking...it is most likely a misfire but was causes these? is it lean conditions? bad plugs? leaks?
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Old 09-07-2003, 02:36 PM
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Unburnt fuel entering the exhaust. Too rich, colder plugs can cause it, will be fine with retuned ECU and will get alittle better with ECU reset.
 
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Need advice on Uppipe and Downpipe




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