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Subaru Impreza Engine Problems

241 messages,  Last post on Nov 26, 2009 at 5:37 PM

You are in the Subaru Impreza Maintenance & Repair Forum. Your Host is kcram

What is this discussion about? Subaru Impreza, Engine, Sedan, Wagon


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#152 of 241
Re: 2008 Impreza stalls while in motion [sgoss] by npb2000
Jan 10, 2008 (2:24 pm)
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Replying to: sgoss (Jan 06, 2008 7:40 am)

I have 2006 impreza. I have a similar issue with idling/stalling(or almost stalling) whenever I remove the battery. After putting battery back in (i take it out to get to driver headlight easier) I see this issue for a couple days (a couple hundred miles) then back to normal. Think it's a computer issue, like a factory reset or something so the car can "learn" your driving habits. Yours automatic?
#153 of 241
Re: New Member, High Mileage Impreza [npb2000] by paisan
Jan 10, 2008 (5:38 pm)
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Replying to: npb2000 (Jan 10, 2008 2:11 pm)

Go with stock NGK replacement plugs.
I'd run full synthetic (redline or amsoil) for such a high milage car.
On the AT I'd put a cooler in and make sure that is drained/filled every 20k miles.
 
Other than that you should be good to go.
 
-mike
#154 of 241
Re: 2008 Impreza stalls while in motion [npb2000] by sgoss
Jan 12, 2008 (7:32 am)
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Replying to: npb2000 (Jan 10, 2008 2:24 pm)

No it's standard.... The problem is though it's only a month old and the dealership is telling me there is nothing wrong with it but it stalls when i am still moving! I'm just not sure what else I can do...
#155 of 241
Re: New Member, High Mileage Impreza [paisan] by npb2000
Jan 12, 2008 (10:55 am)
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Replying to: paisan (Jan 10, 2008 5:38 pm)

Thanks for the tips Mike. If/When I switch over to full synthetic oil, at what frequency do you recommend changes? I currently change monthly (every ~3000-5000 miles).
#156 of 241
Re: New Member, High Mileage Impreza [npb2000] by paisan
Jan 12, 2008 (7:17 pm)
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Replying to: npb2000 (Jan 12, 2008 10:55 am)

I'd say do it every 10k or so. That should keep you in good shape with the milage that you drive. I'd also look into getting an Amsoil or other high-milage filter for the car. It's the filter that keeps the oil clean and generally the oil won't break down but the filter will get clogged before you hit 10k miles.
 
-mike
#157 of 241
Re: 2008 Impreza stalls while in motion [sgoss] by haemon17
Jan 15, 2008 (5:39 pm)
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Replying to: sgoss (Jan 12, 2008 7:32 am)

I just got a 2008 Impreza 2.5 wagon less than 2 months ago and it has stalled 8 times since I've had it. The dealer said the same thing to me when I took it in. I'm going in again tomorrow, so we'll see what happens.
#158 of 241
Re: 2008 Impreza stalls while in motion [haemon17] by sgoss
Jan 16, 2008 (9:43 am)
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Replying to: haemon17 (Jan 15, 2008 5:39 pm)

well let me know what they tell you. I too am going back to the dealer tomorrow to see if they can find the problem... will post what they say
#159 of 241
Re: 2008 Impreza stalls while in motion [sgoss] by sigh_of_relief
Jan 20, 2008 (1:02 pm)
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Replying to: sgoss (Jan 16, 2008 9:43 am)

I too had this very same problem. I have owned the car for a couple months now. Last week here in Canada I was on my way to work and coming up to a traffic light I began to brake. The car is a manual.
I pushed the clutch in and applied the brake in the usual gentle manner. Once I had come to a stop I noticed a couple new lights on the dash. I then realized the car had stalled. I started the car again, accelerated forward a little then hit the breaks, same thing, it stalled again!
I then thought it might be due to excessive power draw (please note lights were not on, nor was defroster... just radio, AC to dehumidify, and wife's seat warmer). At this point I turned seat warmer off, likely largest draw. I then accelerated and hit the brakes, the rpm slowly came down as normal then dropped below the 300 rpm line and lugged but recovered (barely).
 
Anyway, after that day I have now always nervously watched the Tachometer when clutch goes in or I stop. I have noticed the RPM going very low and lugging many a time but no stall.
Now it has only been a few days since the stalling and I believe I know what the problem is!
When you start the car the blue/cold engine light is on. If you drive away without allowing the car sufficient time to warm up (and the blue light go off) then the idle seems to run lower and recover from an RPM drop poorly. I believe this may be the computer learning the precise idle mixture requirements for idle (given atmospheric conditions). If you drive away too early it is not given adequate time to make the adjustments.
Please let me know as I have ensure blue light goes out always since then and all lugging has even gone away completely.
#160 of 241
Re: 2008 Impreza stalls while in motion [sigh_of_relief] by sigh_of_relief
Jan 20, 2008 (1:05 pm)
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Replying to: sigh_of_relief (Jan 20, 2008 1:02 pm)

I do plan to bring this up to the dealer on Monday still and have them do an investigation.
#161 of 241
Re: 2008 Impreza stalls while in motion [sigh_of_relief] by npb2000
Jan 21, 2008 (4:55 am)
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Replying to: sigh_of_relief (Jan 20, 2008 1:02 pm)

That may very well be the case. I changed the driver headlight yesterday, unfortunately had to remove the battery again to access it. The car did idle ok at initial start up after the battery was back in. However (Auto Trans) I reved the gas a little in park and the RPM drop stalled the car (2500rpm and then off the gas all together). I re started the car and reved it up again, now slowly letting the rpm's drop to appropriate idle level. The car did not stall, but almost did. Then I drove 300 miles home from my weekend sales meeting with no problems, but every time I stop I can just feel it struggling a bit to idle, and I'm quick to pop it in neutral.

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