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Old 12-27-2002, 06:44 AM   #1
thebusiness999
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Default Can a Subaru dealer reflash the stock ECU?

The subject says it all...I lost my FBC settings and am now forced to run boost based on the wastegate spring. It seems like this has happened to some people who switched from MBC or EBC back to factory boost control.

I'm taking it to the dealer on Monday and was wondering if they'd be able to reflash the stock ECU and get my car boosting as it should again. Any idea how much it costs?

Paul
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Old 12-27-2002, 10:34 AM   #2
cmaj7
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Default Yep

My brother had a problem with his 02 WRX Wagon. The problem was the ECU and a reflash fixed it.

Also, there has been at least one recall for which the fix was a reflash! Call your local "mod friendly" Subaru dealer!
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Old 12-27-2002, 11:13 AM   #3
Pavlo
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A reflsah shouldn't fix that sort of problem, as there is no way you can change what's in the ECU with anything you do.

I also don't beleive the dealers have the facility to reflash an ecu, if they did, why would Prodrive be using Ecutek to do the next gen PPP upgrades?

I think what the dealer did was to RESET the ecu. There is a change that the ECU is running in safemode, which will remove all boost conrol except the actuator.

Try disconnecting the battery for half an hour, as that's an easy way to reset the ECU.

Paul
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Old 12-27-2002, 03:07 PM   #4
thebusiness999
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I think my ECU has been reset at least twice in the process of putting my new engine in it, and I've still been unable to make full boost.

The battery is disconnected right now...we'll see what happens.
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Old 12-27-2002, 05:10 PM   #5
Pavlo
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The oter thing of course is that there is something that makes the ECU think you have a problem.

If the ECU detects things like abnormal MAF sensr reading, incorrect idle control, constant detonation (unlikely) then if will continue in safe mode.

It varies over the years, but I think the ECU will come out of safe mode after 10km of safe normal activity. Obviously if the thing causing the fault is remaining then you'll be going into safemode all the time.

I don't know how to get the error codes up on the new cars, (there are some connectors under the dash anyone can use on the older cars) but that may tell you what's up. The thing is, the sorts of errors that can cause safemode, don't always trigger a constant CEL (check engine light on dashboard), so you may have a problem but not know.

Did you disturb any of the wiring, connectors or plumbing?

paul
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Old 12-28-2002, 12:07 AM   #6
cmaj7
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Quote:
Originally posted by Pavlo
A reflsah shouldn't fix that sort of problem, as there is no way you can change what's in the ECU with anything you do.

I also don't beleive the dealers have the facility to reflash an ecu, if they did, why would Prodrive be using Ecutek to do the next gen PPP upgrades?

I think what the dealer did was to RESET the ecu. There is a change that the ECU is running in safemode, which will remove all boost conrol except the actuator.

Try disconnecting the battery for half an hour, as that's an easy way to reset the ECU.

Paul
The dealer has the ability to re-flash the ECU with code provided by Subaru, this is completely different from using an application such as ECUTEK's which allows you to create and customize maps.

The dealer did not simply reset the ECU, they reflashed it.

Here is another thread where this has been discussed

http://forums.nasioc.com/forums/show...call+flash+ecu
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Old 12-28-2002, 12:38 AM   #7
amelnikov
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it's most likely the plumbing and not the ecu. Check to make sure there is a restrictor in the line that goes from the turbo niplple, before the "T". If you don't, there is your problem.

Alex...
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Old 12-28-2002, 12:43 AM   #8
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Basically everyone is saying the same correct info. Plumbing is probably screwed, stock ECU running in safemode. Take it to the dealer if you don't have too many mods.


Full_Clip drove his Accord 1500 mi without the vacuum line plugged in.
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Old 12-28-2002, 06:10 AM   #9
thebusiness999
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I compared my plumbing to some untouched WRXs and it's identical to theirs...the only difference between my car and theirs is that from this past summer up until a month ago, my car was using an AVC-R for boost control, with the stock solenoid just sitting idle under the little plastic cover in the engine bay.

I do have that little brass restrictor and it's in the hose coming off the compressor side of the turbo...

I have an appointment scheduled with the dealer for Monday morning...if I can't fix this by then, maybe they'll figure it out.

Any other ideas?
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