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Old 04-19-2005, 08:30 AM   #1
Scooby Specialist
Member#: 60224
Join Date: Apr 2004
Chapter/Region: MAIC
Location: NOVA
2008 FXT Sports 2.5
Dark Grey Metallic

Default Need UTEC advice

I’m looking to buy a UTEC but am a bit unclear on which software version I need to run for my swap project. I run an 05’ WRX motor, engine sensors, and engine wiring harness BUT am using an 02’ ECU, bulkhead wiring harness, and fuel pump controller. My question is what actually requires the open-loop fuelling (v4.2) and would I have to use it? I imagine this is a feature of the 04-05 stock ECU and therefore I don’t need it, but just wanted to double check.

All comments appreciated…
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Old 04-19-2005, 11:40 AM   #2
Scooby Specialist
Member#: 27108
Join Date: Oct 2002
Chapter/Region: MWSOC
Location: Detroit-ish, MI
2004 STi
2004 A4


Just run the latest firmware. Unless you have an automatic, there is no reason not to.
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