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Hey Subaru Nation -

 

I have a 1992 Legacy 2.2 (non-turbo) and I'm trying to diagnose some idling issues. The car runs fine but once its warmed up it begins to surge idle at stops (sometimes stalling). I had a cracked air intake and I replaced it with no resolve and I've cleaned out the throttle body and I'm currently replacing the Idle air control valve with a new one (new gaskets all around). My next option is replacing the mass air flow sensor. My current sensor has 5 pins and all of the replacements I've seen online have 5 slots but only 4 pins?? Does it matter? Will the 4 pin work the same? Also if anyone has any further ideas or sollutions for idling issues - I'm much appreciative.  I've also changed out the coolant/thermostat.

 

Thanks for the help! ;)

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Welcome to the USMB.

 

Yes the four pin MAF sensors will work fine.

 

How does the engine/car run besides the poor idling?  Is the poor idling your only problem?

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engine temp sensor? Do the fans run constantly? perhaps the car thinks its cold when warm, or vice versa, probably confusing the IACV

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