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Old 08-21-2004, 11:44 PM   #1
my02turboWRX
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Join Date: Aug 2004
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2008 WRX STi
Cobb tunned by Surgeline

Default is reflash required with ANY major mods?

hey guys I have had this car for a week now and still trying to find the cause of why this car has no power and a huge stumble over 5500 RPM

this car has a huge turbo back exhaust on it
CAI which I despise
and an ol noisy blitz BOV

that is all I can find for aftermarket stuff on this car.

with such a large open exhaust on the car and intake does a person need to reflash the ECU to make it all work right?

I have already done the mechanical checkout-all good to go
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Old 08-22-2004, 12:10 AM   #2
gjhsu
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it's recommended, especially if you want to make the most of those mods. If not a reflash, a tuned piggyback system would work, too.
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Old 08-22-2004, 12:17 AM   #3
ms3p
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1. Have you driven a stock WRX to have some grounds for comparison?
2. What do you mean by "huge" TBE?
3. What are your expectations from the car with those mods?
4. The BOV would not make much difference anyway.Ebay it
5.The CAI if you have ever read anything on these boards would do you more harm than good.---Ebay it
6. A reflash/ tuning is always a great thing, even on a stock car. So, that could be only beneficial anyways. In other words: DO IT.
Desi

Last edited by ms3p; 08-22-2004 at 12:41 AM.
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Old 08-22-2004, 12:24 AM   #4
drees
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You can run a turbo-back without additional engine management without any problems.

Ditch that CAI and BOV for stock pieces, they can cause problems without additional engine management / tuning. When you do that, reset your ECU as well.

If the car still stumbles at high RPMs after that, it's some other issues with it.
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Old 08-22-2004, 11:01 AM   #5
Jaxx
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i think that a stage 1 reflash should be your first mod
it takes care of the partial throttle boost issue
it removes the excessivly conservitive tune
it removes the cels that are casued by many down pipes

it is espically nessicary on the 04 models whcih seem to be even more conservitly tuned

like they said ditch the CAI and the bov
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Old 08-22-2004, 12:33 PM   #6
drees
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Quote:
Originally Posted by Jaxx
I think that a stage 1 reflash should be your first mod.
It takes care of the partial throttle boost issue.
It removes the excessively conservative tune.
It removes the cels that are caused by many down pipes.

It is especially necessary on the 04 models which seem to be even more conservatively tuned.

Like they said ditch the CAI and the BOV.
Some punctuation and spelling would be nice.

That said, I wouldn't suggest adding any further mods (such as ECU tuning/flashing) until the car is running well on the stock mapping. CELs caused by missing cats or are easily fixed with a $1 resistor. I would also argue that the stock programming is not excessively conservative, especially that the 04+ are more conservative than earlier ECUs, they are basically the same except for the changes to close/open loop fueling under initial hard throttle.

There are no part throttle boost issues on the stock ECU mapping. You only run into part throttle boost issues if you are running a MBC.
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