I have a 1999 Legacy Outback automatic with 130K.
I'm having an issue and it seems my mechanic is not able to solve. At random times when I am driving my car, it stalls at slow speeds or when stopped. Sometimes it will go days with no issue, other times it will happen a dozen times in one trip. It has always started right back up.
How it happens: I've noticed before it happens my engine will start to idle exceptionally low, almost bottom out the tach. One time I could hear the accelerator through the radio (as I pressed the accelerator, a buzz would get louder on the radio). Then, usually when stopped, the car with completely shut off, radio and and all. The electrical stuff will turn back on immediately because the key is in, but I need to restart the engine. Sometimes it will die almost immediately again, other times it will last a few minutes, sometimes a few days.
One time, I had the issue multiple times, but managed to get it home. A few hours later I tried to start it to bring it to the mechanic and it would not start, the battery was fine because all the elelctrical stuff was working, but it just clicked when I turned the key. The next morning, it started fine.
When the stalls happen, usually the check engine light will come on. My mechanic says it is showing code P1100.
The first time I brought it to my mechanic, he said it was the ignition switch. They replaced it, but it did not help at all, 2nd time driving the car after I got it back it had the issue. It happened a few more times so I brought it in again. They claim they checked it up and down and could find nothing wrong, nor could they replicate the issue. Just a day after I got it back the second time, of course the issue happened again.
My mechanic said he will check it again, but I am loosing my faith and think he will again insist it is fine. I know it is not fine and it's getting to the point where I fear driving the thing because it might break down or get worse.
some recent repairs:
At about 90K I had the head gasket problem and had that repaired.
100K new starter
120K body work, front right side, headlight (hit deer)
120K plugs/wires, CV boot
130K (3 months ago): Timing belt, water pump
problem developed just a week after the timing belt/water pump job.
2.5 months ago: new ignition switch
did not fix problem
So anyone have any idea?