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Gen 3 harness on Gen 4 motor?

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Old 07-13-2014, 01:49 PM
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Default Gen 3 harness on Gen 4 motor?

Ok, so I have a 2007 5.3ls im putting in my 64 belair with a single s475 turbocharger. Im running the fbody pan, intake mainfold, and bought a gen 3 fbody harness tuned for a 88mm single turbo open loop speed density tuned ecu with all of the emissions wiring stripped. What do I need to make this harness work on my gen 4 motor. Please help, thanks in advance

Nathan
Old 07-13-2014, 02:17 PM
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07 Classic or NBS. Makes a big difference. If it is a NBS 5.3L, then you are going to need a 24x reluctor on the crank or the Lingenfelter conversion box. A few other things like cam sensor and knock sensors will be in a different location and style. And I doubt the tune will be right. Those kinds of mods require tuning with the car in front of the tuner.
Old 07-13-2014, 06:51 PM
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Im new to all this so forgive me, but how do I know if my motor is nbs or classic? Would it be easier to start with a new custom built harness? Thanks guys
Old 07-14-2014, 05:42 PM
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Need some help here guys. Would megasquirt be a better option? Please help a new guy out. I want the easiest and cleanest wiring setup to run my motor. And i don't need all the emissions junk. Thanks

Nathan
Old 07-14-2014, 06:34 PM
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What color is the plastic on the crank sensor? Black or gray? Where is the cam sensor? Timing chain cover or behind the intake manifold?
Old 07-14-2014, 07:17 PM
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The first pic is the sensor on the timing chain cover. The second is the two sensors right behind the intake manifold.
Attached Thumbnails Gen 3 harness on Gen 4 motor?-1405383137499.jpg   Gen 3 harness on Gen 4 motor?-1405383200482.jpg  
Old 07-14-2014, 07:38 PM
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This is the sensor on the back right side of the block
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Old 07-15-2014, 10:38 PM
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Anyone?
Old 07-15-2014, 11:13 PM
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Ok, you have a 58x crank, and cam. you will have to change the ecu or get the converter box.
Old 07-16-2014, 12:18 AM
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Originally Posted by EFIHARNESS
Ok, you have a 58x crank, and cam. you will have to change the ecu or get the converter box.
Thanks for the help



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