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code 42 idle switch

espey_16
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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I tried searching, but didn't really find much, where is the idle swich located on a 91 ej22? And how do you change it out? If you guys have a link to a thread that would be great. My dads car is running real rough and I pulled 2 codes, 17 injector #4, and 42 idle switch. Unfortunatly no auto parts stores around me carry injectors so I'm gonna go to the jy and pull a few and see which one works best. Thanks guys.

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