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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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#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.
#162 of 241
Re: 2008 Impreza stalls while in motion [npb2000] by paisan
Jan 21, 2008 (4:14 pm)
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Replying to: npb2000 (Jan 21, 2008 4:55 am)

Hmm, did you happen to jar anything that might be part of the air intake system? You may have introduced a vaccum leak, that is causing your stalling.
 
-mike
Motorsports and Modifications Host
#163 of 241
Re: 2008 Impreza stalls while in motion [paisan] by sigh_of_relief
Jan 21, 2008 (6:57 pm)
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Replying to: paisan (Jan 21, 2008 4:14 pm)

Should be as solid as the day it left the factory and only 1000 miles. No modifications in any way (bone stock non-turbo), I use Shell gasoline 87 Octane as required so not likely to be bad gas.
Anyway, I have made an appointment for next Wednesday, I'll keep you all informed.
#164 of 241
Re: 2008 Impreza stalls while in motion [sigh_of_relief] by paisan
Jan 21, 2008 (7:03 pm)
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Replying to: sigh_of_relief (Jan 21, 2008 6:57 pm)

My guess is that you probably knocked a vaccum line loose somewhere and that's causing your problem.
 
-mike
Motorsports and Modifications Host
#165 of 241
Re: 2008 Impreza stalls while in motion [paisan] by sigh_of_relief
Jan 21, 2008 (7:07 pm)
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Replying to: paisan (Jan 21, 2008 7:03 pm)

Thanks Mike, I'll make a point of mentioning this when it's in next Wednesday.
#166 of 241
fuel pump by jeffearl
Jan 22, 2008 (6:04 pm)
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My son has a '95 Impreza and I had to tow him home a couple of nights ago. The car acts like it is running out of gas and then dies. I let it sit a couple of days and took the fuel filter off to check it. Sure enough, I can hardly blow through it. A new one has no resistance blowing through it, so I must be on the right path. I'm concerned that I need to bleed the air in the filter, so I turn the key to the on position to start the fuel pump. No fuel. The tank is 1/2 full or my son thinks so (the fuel gauge does not work). Can you hear the fuel pump work with the key turned on? Do you have to bleed the fuel system when changing fuel filters? Is the fuel pump located in the fuel tank?
Does it sound like a fuel pump? Does this car have an oil pressure relay that could control the fuel pump?

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