mikeamondo Posted April 16, 2006 Share Posted April 16, 2006 Okay... I've got this '90 Legacy named Blubaru.... mainly because we already had one named Emeril... Emeril Legacy.... (BAM!).... and couldn't come up with any other name. And he's blue. So old Blue was developing a miss on the hills and the check engine light would come on... coded O2 Sensor. So last week I changed the sensor and the light went out. But the miss is still there. Here are the details..... Starts easy and runs nearly perfect while cold. After an hour or so, once the car gets good and hot, (not overheating), it begins a subtle miss while going up hill or during aggressive accelerations. This gets worse over the next half hour or so, until it barely wants to climb any hill faster than 35 or 40 mph and you can forget about jumping out into traffic! If you park the car for a little while and let it cool down, it runs good again until it heats back up. The check engine light does not come on. What is the consensus on the next thing we should change out or test? We are determined to fix this car without taking it to a mechanic! Thanks! Mike Quote Link to comment Share on other sites More sharing options...
740gle Posted April 16, 2006 Share Posted April 16, 2006 fuel deprived? Just a while guess. HTH -Michael Quote Link to comment Share on other sites More sharing options...
Strakes Posted April 16, 2006 Share Posted April 16, 2006 Does this link sound like what's happening to you? http://www.ultimatesubaru.org/forum/showthread.php?t=56130 If it's not fuel related, the pesky coolant temp sensor may be suspect. About $20 for a new one, super easy to replace. Quote Link to comment Share on other sites More sharing options...
Skip Posted April 16, 2006 Share Posted April 16, 2006 You may want to read Pacman's reply in this post Ignition relay problems and such Quote Link to comment Share on other sites More sharing options...
reddevil Posted April 16, 2006 Share Posted April 16, 2006 spark plug wires Quote Link to comment Share on other sites More sharing options...
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