Swap vq's z to g35 - Page 2 - - Infiniti G35 & G37 Forum Discussion | rupromenergo.ru
Show Your Support Become A Premier Member

    > >
  • Reload this Page >
    • Swap vq's z to g35


Swap vq's z to g35

Thread Tools Rate Thread
Old 11-19-2017, 11:16 AM
Registered User
Join Date: Sep 2016
Posts: 26
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by SMG_G35 View Post
I have a 05 g35 coupe had a revup motor and the motor blew. So I picked up a motor from an 04 350z motor trans harness and ecu. So I swapped everything in my g and the car won't start. The z motor was running when I pulled it out. There no spark or fuel and I've went back and forth with the ecu's nothing. I've checked all the fuses and everything is connected. Car still won't start. Anybody have any idea?? Lmk thanks!
Ancient thread, but on the off chance that you (or anyone knowledgeable) reads this:

Were you able to resolve this? Iím fighting a similar issue. Alarm light (red one on the dash to the left of the instrument cluster) is on and not flashing with the key in the ďONĒ position. No power to the OBD port, but the cigarette lighter has power.

With the ECU from the 350Z, no power to the ignition coil harness connectors. With the (original, matches my keys) ECU, power to the coil harness but only 1.3V. Shouldnít it be around 12? No spark in any case.

All the interior stuff - nav, dash lights, etc. - works. Iíd chalk this up to anti theft, but since the OBD port isnít getting power, scanners and diagnostic tools canít connect.

Car was sitting for nearly two years. Iím about to go probe the ECU connector to check power and grounds.

If anyone has any suggestions, please speak up!
Old 11-19-2017, 12:25 PM
's Avatar
Cleric670
Join Date: May 2017
location: Washington State
Posts: 1,956
Thanked 181 Times in 177 Posts
If you downgrade from the revup to the non-rev motor you have to rewire the ECU harness because the pin layout isn't the same. Snag both FSM's and compare the harnesses you'll see.
Old 11-19-2017, 01:35 PM
Registered User
Join Date: Sep 2016
Posts: 26
Thanked 0 Times in 0 Posts
Thanks. I have the FSM for my 06, looking for the one for the 05 350Z. I'm guessing that it should be the same as the 04 G35, hopefully. Looking forward to rewiring a 150-ish pin harness connector. :/

The funny thing is that, even with the computer that came with this engine and harness - JDM from an 05 350Z -, there's no power to the OBD port. I'm tracing through the wiring diagrams, still trying to figure out which fuse is for what in the fuse and relay block behind the battery.
Old 11-19-2017, 02:28 PM
Registered User
Join Date: Sep 2016
Posts: 26
Thanked 0 Times in 0 Posts
And, now looking at the harnesses in the passenger compartment and connections to the engine harness, I see they're VERY different. This'll be fun.
Old 11-19-2017, 02:58 PM
Registered User
Join Date: Sep 2016
Posts: 26
Thanked 0 Times in 0 Posts
After a little more research and crawling all over the car: I'm wondering if it makes more sense to swap out the wiring harness on this engine - replace it with the one from the rev-up. I'm building a map of which wires need to be moved, and it's non-trivial, to put it lightly.

But, getting the harness off with the engine in the car might also be non-trivial. Now, where'd my flashlight go...

And, then there's the issue of how the ECU will deal with not being able to talk to the missing VVT components. I found this thread:

http://rupromenergo.ru/forums/g35-cou...non-revup.html

Which indicates that the car will run, but will throw a CEL. I'm okay with that. The other harness would also give me back the variable-assist steering that's missing from the 350Z harness, and I wouldn't have to worry about the antitheft BS and getting keys reprogrammed. There's also no guarantee that there's a 1:1 relationship between the Z harness and the G harness. The smaller of the two white connectors in the passenger foot well has quite a few more lines going to it on the G harness...

Guess I better get started.

I'd love to hear from anyone that's done this before.

Last edited by raygun; 11-19-2017 at 03:17 PM.
Old 01-04-2018, 05:28 PM
Registered User
Join Date: Sep 2016
Posts: 26
Thanked 0 Times in 0 Posts
In case anyone else winds up trying this:

I wound up using the G35 engine harness, 350Z ECM and (duh) 350Z non-rev motor. I didn’t have to splice the harness at all, though there are four extra connectors I had to protect against the elements. They’re for the rev-up VVT sensors and actuators that aren’t present on the donor engine. I had planned to use the G35 ECM, but I think I fried it at some point. Shrug.

I had to reprogram the ECM due to NATS. I did this with a VAG-K OBD2 cable and Nissan DataScan (NDS) software. (About $50 if I remember correctly, much cheaper than a trip to the dealer!) On your BCM - driver’s side footwell near the dead pedal - there is a 5-digit hex code labeled ‘PIN code’. There are a number of apps available that will convert that code to a 4-digit code that NDS needs to reprogram the car. I found a free web-based tool somewhere, can’t find the link at the moment, but it worked fine. Worst case is you pay someone on justAnswer to decode it for you.

The only real issue was that my car has 6-wire wideband downstream O2 sensors, while the donor engine had 4-wire narrow band sensors. I just swapped the wide bands over to the new engine and, oddly enough, the 350Z ECM reads them just fine. I’m a software guy; I’m not surprised the ECM *can* do that, more shocked that it *does* without modifications.

I have a CEL due to the missing VVT components, but I’m not super-worried about it. Car runs fine, no noticeable power difference.

So, to all those that said you can’t replace a rev-up with a non-rev VQ:

Well, you can.

Also: the NDS software is *awesome.* Being able to do things like deactivate individual cylinders (for testing spark and fuel), see the output of basically every sensor on the car, etc. is incredibly helpful when debugging the car. I’d say it’s as good, or better than, HP Tuners (for my other GM car), and about 1/10th the price. It's not as capable as a real Consult II, but it did everything I needed for this swap.

Last edited by raygun; 01-05-2018 at 10:47 AM. Reason: Added a note about NDS
Old 01-04-2018, 05:55 PM
's Avatar
Cleric670
Join Date: May 2017
location: Washington State
Posts: 1,956
Thanked 181 Times in 177 Posts
You have proven us wrong!

Glad you were able to get everything running again, I hate to see G's turn to dust.
The Following User Says Thank You to [email protected] For This Useful Post:
raygun (01-04-2018)

Related Topics
Thread Thread Starter Forum Replies Last Post
FS: G35 coupe sport side skirts R350k5 Exterior - Body Parts 10 10-01-2015 09:41 PM
FS[Canada]: G35 OEM Style Lip Spoiler netcbc Exterior - Body Parts CDN 2 08-21-2015 10:50 AM
FS: G35 Quad Projectors VANST3R Lights 2 07-27-2015 09:20 PM
FS: G35 coupe front splash guards in black obsidian color laksjd84 Exterior - Body Parts 1 07-24-2015 06:12 PM
Reputable shop to do Manual Swap? HypedAndy Southern California 0 07-21-2015 04:46 PM


Tags
04, 05, 350z, driver, engine, g35, harness, karma, motor, rev, swap, vlsd, vq, wire, wont
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:18 PM.


Copyright ©2002 - 2017, rupromenergo.ru All Rights Reserved. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in:

Related pages


centric posi quiet ceramic brake pads reviewhhhnhow much to install lojackwhere do i pour the antifreezea bird just pooped on meinfiniti jx forumdiy fender pulljl audio w3v3piston rings costhow to remove carbon fiber wrapenergy suspension canadamishimoto universal oil cooler kitkonig crosshairshow much is a car paint job at maacorims dallas txstance nation stickerbroadway rear mirrorrestore wheels rimsvq30dett for saleaerospace protectant 303 retailersbose 6.5 speakerspolished intake manifold0420 car codemegan downpipegreddy twin turbo g35paint rims with plasti dipk n filter recharge kit240sx hood pinsups monterey parkhow to rebuild brembo caliperssts turbo priceis lojack worth itatf coolerstaggerd rimswhere is rear main seal located2005 infiniti g35 window motorpioneer avic-z120bt updateinfiniti g35 wikipediagtr canada forumviper remote start pricetenzo rbmw z4 coupe review top gearroad force balancinghow many quarts oil changearamid gaskethow much to resurface rotorseiback pro kitprogramming nissan key fobnissan 350z seatstesting camshaft sensorinfiniti wallpapernissan antenna adapter2007 infiniti g35 0-60belt dressing canadian tirealtima se r wheelsz1 hfcbest lug nut lockseibach pro kit droptuned infiniti g37g35 or g37muffler tail114.3 wheelswix 51356vossen lug nutsbridgestone re760oil change infinitibody kit g35intake resonatorblue hid headlights illegalbumper hole plugstrim tape for carsboostmotorgroup comlarge evap leakwill 5x120 fit 5x114 3kayak rack for sedanwheel and tire offset calculator