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Rough Idle Legacy 1990

northwestguy1
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

Featured Replies

Hey,

 

I have a legacy 1990 with an automatic transmission. It was idling rough so I replaced the MAF sensor and put a new air filter in. 

 

The idle seems to be much better but when I have it in drive and stopped like at a light I get some rough surges and the idle is still a little rough.

 

Any suggestions on what I can check next? Maybe the IAC? It has a real good response when accelerating so lacking no power since the MAF was replaced.

 

Thanks

  • Author

Also the MAF sensor I bought only has 4 pins going to it but my old sensor which was factory (looks real old had 5 pins) The car runs fine no check engine light so did they change the pins on them now??

  • 4 weeks later...

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