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Old 10-18-2011, 12:16 PM   #1
Scooby Newbie
Member#: 205484
Join Date: Mar 2009
Chapter/Region: MWSOC
Location: Wonder lake, IL
2005 WRX

Default 2002 Subaru Engine Swap

alright guys im looking for some help. We have a 2002 Subaru Wrx, the customer blew the engine and wanted to put in a 2.5 sti block (2004 directly from subaru) in his 2002 with the 2.0 heads.

we got everything in and the base tune is done, however the car is still acting very very wierd.

The tuner is coming back out today to see what the computer is doing but mechanically there maybe something else wrong.

The car is bouncing around Alot when you put any boost to the car. It seems like it is hitting a fuel cut or boost cut but all systems are working properly. No vacum leak and fuel pressure is staying at what it should (those both have been checked)

The wierd part of the situation is the car runs with the MAF disconnected but will die as soon as its replugged in (The MAF is brand new) same problem happens, Even using one from a car that we know works ends in the same result.
The tuner told me that the car goes in speed density mode when the MAF is disconnected.

The last thing is there was a Apex system on this car the was put on prior to us from another shop, we have taken that out and yet still same result. The car seems to break up in the range of 2K and 3,500 RPM.

The TGV (or whatever) are electrically disconnected which is what we were told could be the issue but same result, the break up keeps happening.

Is there a known issue that does this or trial/error is the only way.

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Old 10-18-2011, 02:26 PM   #2
Scooby Guru
Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va

What do you mean the tgv's are "electronically" disconnected? If they have been deleted mechanically and the appropriate codes disabled there should be no issue. If all you did was unplug them then yes that could be a problem. Does the car not have a CEL/DTC?
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