i have a 98 dodge ram 1500 with the 3.9 v-6 nv3500 swb 2wd i am pulling the motor and tranny out,and i have a 5.2 and a nv4500 out of a 94 ram 2500 i need help with the wiring. can i just add two wires to the extra injectors and how do i do that. i have the computer and wiring harness out of the 94 still on the 5.2 i would use them but the fusebox where the harness connect on the 98 is one big square block and the one for the 94 is three different plugs can i splice the wires in and if so where can i get a diagRAM for this i have looked everywhere someone please help i really am close to haveing this swap done

 

Some of these other guys can tell you more conclusively, but a 94 is gonna be an egr equipped motor as well. Not sure of compatability or delete options or if this will even be an issue

 

No, you must use the wiring harness that came with the V-8. These engines are sequential port injection, which means that it only fires one injector at a time, so, they are all individually controlled.

Trouble you are going to have is, the 94 is OBDI, your 98 is OBDII..... so, if I had to hazard a guess, I would say that computer/harness isn't going to work for you. There will be a lot missing from the harness, (and some extra stuff the 98' didn't have...) and the OBDI PCM isn't going to be telling your Instrument cluster what's going on either.

You need a PCM and harness out of a 98....... with a v-8 and manual.

 

The egr doesn't matter as far as the bolt up and exaust goes everything else works fine even the driveshaft the only thing that is getting me is the wiring I HATE wiring

 

Are you pulling the V6 because it's bad, or because you just want a bigger engine? If it's the latter, how about selling it and buying a 5.2? I hate wiring too, almost as much as I hate trucks that are all bodged together with non-standard wiring.

 

Both the v6 blew the intake gasket and was literally dumping water in the motor it still ran good but it was really nasty when I tore it down I have the 5.2 already it's backed by a nv4500 out of a 94 2500 I already measured everything should fit fine it's just the wiring

 

I would do as HeyYou mentioned and head to a jk and get the engine wiring harness/pcm from a 98 5.2 V8.

Service manuals can be found at the link below, and there are wiring diag in there, 95 might be the same as a 94, but I am not sure about the 2001 book working for the 98. I am thinking that you need to cut off the ends of each harness going into the firewall, start matching up the right wires and soldering. Like HeyYou has mentioned some things might just not work, OBD1 in a OBD2 truck.....


https://dodgeforum.com/forum/2nd-gen...e-manuals.html

 

OK, go for it - you certainly seem to know what you're doing, and that'll be a nice ride when you're done.

 

asd relay no ground

 

I can't find the harness anywhere or te computer any good online site to get these parts