Acoolusername Posted July 14, 2014 Share Posted July 14, 2014 Hey guys newb here with a quick question. I am in the process of swapping an lq4 with a t56 setup in my 280z. I have come across a 5.3 ecm and harness dirt cheap and am having trouble locating an LS1 ecm that someone doesn't want a kidney for. I already have an LS1 t56 harness so my question is this. Since I will be running an LS6 intake can I run this 5.3 harness and ecm and just repin the injector plugs and wires off the LS1 harness? Or can I run the LS1 harness on the 5.3 ecm?. The 5.3 harness is a 1999 with the red and blue ecm connectors. Also has anyone run the dirty dingo engine mounts in their setup? I have nearly all the other swap info I need to get this thing done thanks to this forum. Thanks in advance for any help. Quote Link to comment Share on other sites More sharing options...
SUNNY Z Posted July 15, 2014 Share Posted July 15, 2014 IIRC, all the red/ blue PCM's can go with red/ blue harnesses. I'd run the LS1 harness - less modification. Quote Link to comment Share on other sites More sharing options...
240z72 Posted July 15, 2014 Share Posted July 15, 2014 (edited) My two cents just on the dingo mounts. They are weld in. Not bolt in like the JCI mounts. I'd recommend the bolt in over weld in. Unless you beef up the paper thin frame rails. Again my two cents. Edited July 15, 2014 by 240z72 Quote Link to comment Share on other sites More sharing options...
mattd428 Posted July 15, 2014 Share Posted July 15, 2014 You can run the 5.3 harness but the injector plugs will need to be changed. Both engine are 24 tooth reluctor wheels and all other plugs are the same. Quote Link to comment Share on other sites More sharing options...
Acoolusername Posted July 15, 2014 Author Share Posted July 15, 2014 Thanks guys I just wanted to make sure on the harness/ECM compatibility before I pulled the trigger on it. The dingo mounts I got are bolt in. Sit on top of the factory perches and bolt to the block. Maybe a newer design? They mount like the sbc mounts I pulled out with the old motor. I really appreciate the quick responses! Quote Link to comment Share on other sites More sharing options...
Acoolusername Posted July 15, 2014 Author Share Posted July 15, 2014 I've seen where people have soldered ls1 injectors onto a truck harness. Is there a reason they don't just swap them at the pin out? I will have it all separated anyway making it standalone. Seems like that would be best. But like I said I'm a newb and this is my first swap. Quote Link to comment Share on other sites More sharing options...
Domzs Posted July 15, 2014 Share Posted July 15, 2014 Get on eBay . You can get one for less than $150 with VAT removed , emission deletion , and more . Bought one for my S130 for $100 , years ago , and one for my S30 for $125 about 2 years ago . Quote Link to comment Share on other sites More sharing options...
Domzs Posted July 15, 2014 Share Posted July 15, 2014 Here you go . http://www.ebay.com/itm/Custom-ls1-swap-computer-pcm-ecm-/251328166692?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a84537b24&vxp=mtr Quote Link to comment Share on other sites More sharing options...
Acoolusername Posted July 15, 2014 Author Share Posted July 15, 2014 Thank you Domzs. That is probably the best option. I can pick this 5.3 ECM and harness up locally for sixty bucks so I was just curious if I could make it work for me. Quote Link to comment Share on other sites More sharing options...
mattd428 Posted July 15, 2014 Share Posted July 15, 2014 Connectors are completely different. I had to order new plugs and solder them. Quote Link to comment Share on other sites More sharing options...
Domzs Posted July 15, 2014 Share Posted July 15, 2014 Thank you Domzs. That is probably the best option. I can pick this 5.3 ECM and harness up locally for sixty bucks so I was just curious if I could make it work for me. Remember , most 5.3s or truck PCMs are DBW . Then you have to pay a tuner to delete VAT and other stuff , most will charge about $100 . Look at his store before ordering and PM him your needs . I bought 1 from him for my S30 , not painted . For $135 , it's a great deal . Quote Link to comment Share on other sites More sharing options...
mattd428 Posted July 15, 2014 Share Posted July 15, 2014 His is 99 dom dbw didn't fully come into play until 2003. Should be cable drive. Quote Link to comment Share on other sites More sharing options...
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