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04-09-2019, 01:49 PM | #23 | |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
Quote:
However - to continue with your current process, you can pull this off by sourcing a second FPC and making a jumper harness out of the 8 inch sub-harness it comes with. A good trick to make sure you never mess this up is to make the standalone trigger the fuel pump relay using an opposite electrical signal when compared to the OEM ECU. For example: If the stock ECU is sending a 5V 'enable' signal to the FPC (common to most 32-bit Subaru models), you set the relay up to close when the ECU sends a grounding signal. -or- If the stock ECU is sending a ground 'enable' signal to the FPC (which is how SOME 16-bit Subaru models work), you set the relay up to close when the ECU sends a 12V signal. Side note - the 5V-active controllers WILL accept a 12V signal without any issue. I did it for years on a 2006 STI using a MoTeC M800 before converting to a relay. |
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