Do-Luck Ignition Harness Install

[_GTR_]

How to Install Do-Luck Ignition Harness for R33 GTR.

　

Tools Needed:

• 4mm Allen Key for Valley Cover
• Pliers for Blow By Hose's
• 8mm Socket
• 10mm Socket
• 12mm Socket
• 14mm Socket for Strut Tower Bar
• Ratchet with short extension

Step 1:

Once Strut Tower bar is removed, Use a 4mm Allen Key to remove the 8 bolts from the Valley Cover. Then use pliers to move the clip down the hose of the blow by hose.

Step 2:

Then use a 8mm socket to remove the transistor earth cable, Once that is Done remove the Connector off the transistor unit.

Step 3:

Remove Valley Cover and Unplug Coil Harness Transistor Connector. Next Remove the 6 Coil Pack Connector.

Step 4:

Use a 10mm socket with short extension to remove the Coil Pack Harness Earth Cable

Step 5:

Remove the Intake Side Blow-By Hose and then Unplug Connector. Now you can remove the whole Coil Pack Harness.

Old OEM Harness Removed

Step 6:

Installing the Do-Luck Harness, There are 3 parts to this: The Harness, Earth Cable and Direct Power Feed with Extension Cable.

First sit the Do-Luck Harness in place and connect the harness earth cable and the Thick Blue Earth Cable to the same coil harness earth point. ( Behind Coil Pack Number 6 ).

　

　

Next there is a Connector on the end of the Do-Luck Harness this connects near the intake side blow-by hose.

Once that is done connect all the coil pack connector’s on.

Step 7:

Connect the Thick Blue Earth Cable anywhere in the engine bay. I connected mine near the ABS system.

Step 8:

Connecting the Direct Power Feed with Extension Cable. First Connect the Extension Cable to the end Coil Pack Harness once that is done connect the other end to the direct power feed unit.

Step 9

Connect the Direct Battery Feed Unit to the relay box as shown in the photo below and then connect the Direct Battery Feed Unit Earth to either one of theses Earth points shown in the photo below.

Now it all Connected Up double check that everything is connected and then reconnect all the transistor plugs and transistor earth point. Then reinstall Valley Cover and Tower Strut Bar.

Step 10:

Everything is DONE!! Start it up and take it for a spin.

Results:

When I started the car up the exhaust tone changed and then I gave it a few revs 3000- 4000 rpm and it wasn’t backfire anymore. Next I took it for a 15min drive up to 7000 rpm and it wasn’t backfiring under boost as it did sometimes.

More testing is required to see if it has removed the under 3000 rpm Miss problem and Backfiring under boost problem.

I will keep everyone posted on further result’s but so far I’m happy with the Result.

[SiR_RB]

Great right up

How much was the harness delivered?

[_GTR_]

$215.46 AUD from RHD Japan. Unsure on the postage cost as I bought multiple items from them at once.

http://www.rhdjapan.com/do-luck-enhanced-ignition-harness-kit-nissan-skyline-gt-r.html

[Sinista32]

What's the performance difference between Do-luck and OEM ?

I see it says enhanced in the link - what does that mean - how ?

Never mind, Googled

Apparently uses thicker wire for better strength of signal/power (1.6x's thicker)

Coupled with the "direct wire" from battery (extra) improves voltage delivery.

Edited March 10, 2014 by Sinista32

[_GTR_]

Took the car out for more testing 70km trip and the backfire problem under boost is gone. The Under 3000rpm miss is still there but not as often.

My Setup:

• Copper Core Spark Plugs 0.8 gap
• Splitfire Coil Packs
• Do-Luck Coil Harness

[ms33]

Just about to fit mine, what an excellent write up.