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Anyone Experience On Smart Tuner/perfect Power Smt6 Here?

walkoau

By walkoau,
in Engines & Forced Induction

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walkoau Mentor

walkoau

Posted
Posted

Hi all,

I know this is a long shot.... I bought a r34 gtr vspec about 12 months ago. and found it had a smt6 (smart tuner/perfect power) piggybacked on to the ecu.

now the time has come and i want to upgrade to a power fc. so i have purchased the power fc with hand controller.

I need to know what wiring mods have been done to install the smt6 and correct them to install the power fc.

it wont let me just plug and play the power fc until i revert the wiring back. funny thing is the wiring looks all good on the factory side of the ecu plug. as the smt6 is wired into a extension harness.

the smt6 is patched in on a extension harness to the ecu, so i figured just take out the extension harness and plug in the power fc........ but in wouldn't fire. so i thought perhaps the power fc may have been faulty. So i then plugged in the standard ecu without the smt6 and the same thing happened, it would not fire.

I need to get this sorted out before i take it to the tuners. as they are not familiar with the smt6 it may cost me significantly to have them figure it out. they couldn't even quote me on it.

all help appreciated.

Thanks,

breaker1845 Community Regular

breaker1845

Posted
Posted

Well theoretically if its a piggyback then if you remove the harness extension for the SMT6 you should be able to plug into the factory loom with your Power FC.

Not sure why anyone would but has there been any modifications made to the loom that you can see? Best would be to get the pin out diagram and match it up and check everything is there and nothing has been cut.

Any good tuner should be able to work with any ecu because its the same thing in theory across all ecus except finding some functions may take longer, that is it.

Have another look over the wiring and double check with a diagram. See if you can get the standard ECU to run first before trying the Power FC.

walkoau Mentor

walkoau

Posted
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Posted

There are 2 wires on the factory side of the ecu plug that I noticed have been cut and reconnected. And it looks like both wires are the same colour. ( they may have been cross connected in order to work with the piggy back ecu ignition set up...... Who knows?)

I will check tomorrow what wires they are by looking at the pinout diagram.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

The tuner doesn't need to know anything about the SMT6 because you are going to remove it. You just need to ensure the original wiring is returned to stock. Hmm may not be as simple as it sounds...

Had a quick Google. Did you find the makers instructions? They include this:

". The SMT6 User Kit includes the following items: SMT6 Unit with Injector Driver SMT6 Harness (Wiring Loom) SMT6 Communications Cable SMT6 Shorting Plug (Bridging Plug) This useful product allows you to revert your vehicle to stock standard, should you need to remove the installed SMT6 unit for any reason"

Also you may need to check if there has been any alteration to coil resistance

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