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Nissan doesn't usually have "spare" circuits in the harness that can be re-arranged for different applications. The VVT of the 07's and up include a few other things too, off the top of my head, a current sensor that is attached to the battery cable, different cam sensors, VTC actuators. You'll need the correct harnessing and the correct ECU. Also, if the Titan is anything like my Maxima, when I put an Infiniti drivetrain in it I also had to have the correct keys that matched the ECU and NATS transceiver. I ended up buying an entire donor car for my swap, since the newer Nissans are so integrated, I needed the entire harness, ECU, PCM, NATS system, original keys, etc.

Good luck!
 

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I have the same problem you had with your truck, except mine is an 04 and the engine is 2010. I was wondering how you resolve your problem. I would really appreciate your help or anyone help.
I think you should follow bj2007's suggestion.

If you really want the 2010 engine, you'd be best served to have a 2007+ donor truck. GL finding a donor truck, most Titan's don't get totaled then resold because they are worth too much in scrap. Nearly 6000 pounds of steel gets good money!
 

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I really appreciate the response. I will start looking harness and ECU worst case take motor apart. I do have a question, last week I started looking for harness and ECU for 2010 model. couldn't get help because I didn't know three things, tow package, cruise control or vin #. I tried to explain my situation, but it didn't matter there's like 12 ECUs to pick from. Engine has low mile, bought out of town and can't return it and don't have any information of vehicle it came from. so why does it matter what package vehicle was equip with. What would you recommend.

Once again thank you for yawl's help.
It does not matter for the engine. The ECU is specific to the type of Titan chassis. For example, the 2WD and 4WD Titans have different WOT restrictions, among a bunch of other differences.

If we could know exactly what type of 2004 Titan, then we might be able to suggest a type of 2010 Titan that you could try to get the ECU from that would be mostly similar to your truck.

If it were me, I'd do like the Honda boys do. Use the FSM to research the differences between the 2004 and 2010 ECU harness. If most everything in the harness is the same, then just add a few wires to add the VTC, batt current sensor and whatever else is needed. With Honda's, those guys have figured out how to add just the necessary wires and change a few connectors to keep 90%+ of the original harness when upgrading/swapping to VTEC and/or newer motors.

It's worth a shot...
 
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