98 Subaru Legacy Idle Problem?

lordra1618

New member
The head gasket was replaced (toughest thing to do in the entire universe) on our own. Engine was placed back together fine. Engine starts but will not stay idle for longer than 5 secs every time and then shuts down automatically, even with some revving. Can someone guess whats wrong? After a head gasket, we don't want to troubleshoot anymore. Thanks!
 
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