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Surging idle (dies sometimes)


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I have a 93 legacy with the 2.2 and about a week ago the idle started surging (500-1000) and idleing really rough. It will even die sometimes when the car is just sitting. Another one of my cars had a simalar problem and it was the coolant temp sensor so i replaced that but it changed nothing. Any ideas would be great. The check engine light will go on at highway speeds but never stays on more then 30 sec's or so. I dont have a reader so i havent pulled the codes.

Thanks

David

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I have a 93 legacy with the 2.2 and about a week ago the idle started surging (500-1000) and idleing really rough. It will even die sometimes when the car is just sitting. Another one of my cars had a simalar problem and it was the coolant temp sensor so i replaced that but it changed nothing. Any ideas would be great. The check engine light will go on at highway speeds but never stays on more then 30 sec's or so. I dont have a reader so i havent pulled the codes.

Thanks

David

 

Pull the ECU codes

www.surrealmirage.com/subaru/engine.html

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Though i'd let ya know how it worked out. I pulled the code #32 o2 sensor. Replaced that, still a bad idle. Started hunting for vacume leaks and found that the drivers sides intake manifold gasket had blown out, making one of the cylinder miss at idle, that probaly killed the o2 sensor. Replaced the gasket and now im running great. Thanks for the help and the info on how to pull the codes.

David

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