I currently own a 1992 dodge dakota 3.9L v6 mag and a 1992 dodge dakota 5.2 v8 mag but it has a blown transmission......an my ecm is going bad in my v6 mag and ik that the v8 has a computer in it same year and everything except for the fact its a v8 and obviously has two more pins for 2 injectors but that is the only diffrerence an im wondering if i could take the v8 ecm an use it on my v6.....not sure if I'd have to remove the two extra injectors on the ecm "if that's even possible" or if it would even matter being I don't actually have the other 2 on my v6 ik I sound like a crazy person asking these crazy questions expecting a logical answer but if u look at the pins diagram that's the only diffrerence

3.9 and 5.2 pinout

V8 ECU

This is my 5.2 V8

Old pic of my V6 i already fixed the headlight with on off the v8 i just dont have another pic right now will upload later

 

Nope. The V-8 computer won't run the V-6, programming is completely different.

 

You should be able to find a refurb PCM for your V6 without much trouble. Might even be able to refurb the one on your truck.

 

Appreciate the help honestly I guess ima have to take another look at refurbs or have mine refurbished this should be interesting being that it's my daily an im bout 95% its my pcm going wonky I did an obd with my key an check light an If I read it correctly it's telling me it's a module malfunction on top of that my truck not shifting out correctly and randomly died on me leaving the gas station for no reason but it turned over an drove home just fine on restart that's happened 2 times few other minor things Google says is prolly tcm/ecm issues which makes it a pcm issue of me in my 92 but ima go through all my wiring later today see if there's anything wrong cuz it's a jumbled tanglely mess

V6 pcm

V6 Under the hood

Passenger side

Drivers side

 

Any good suggestions for buying another one or place I could have it reprogrammed and if I was to say buy a high-performance pcm would that make a diffrerence in power or anything

 

It says this pin out is both "3.9L and 5.2L M.P.I" engines an both of my engines are multipoint fuel injection. Pins 17 and 18 are for injectors 7 and 8 but other than that all should be the the same cuz they are the same year both mpi and the ecm housings look exactly the same I'm not saying anyone's wrong I'm just trying to brainstorm an learn anything I can I appreciate anyone's thoughts on this matter

 

My ‘93 V8 would die randomly. It would eventually restart but it turned out the microprocessor was wigging out. Could not be rebuilt. Got a refurb from place in FL. Did not work. They replaced it with another refurb. It worked except for the voltage regulator so I bypassed it with an external regulator. I think I would consider getting a refurb thru RockAuto to be honest. They have standards and if you’re a shoddy supplier you wont last long on RA.

 

You can always get used ones on ebay but make sure you get it from someone who has a good rating and will take returns.

Make sure you need a new PCM first.

 

The crank sensor signal is different between the 6 and 8. The v-8 pcm wouldn't have a clue what to do with the signal from the 6, and I seriously doubt the engine would run. Also, this is a sequential port fuel injected system, which means, it fires one injector at a time, the 8 cylinder pcm is going to expect 8 injectors, (big surprise there eh?) and if there are only six....... fuel sync is going to be way off immediately, and only get worse as things go.

Yes, the wiring is pretty much the same, but, the PROGRAMMING is dramatically different.

 

Ok thank you for explaining that in depth cuz I was really curious about that and the diffrerences so back to the drawing board ill just get that idea outta my head an try working on mine see if got loose grounds or something simple while I try an find a new one oreilys wants bout 200$ rockautos a Lil cheaper but incude shipping an it's over 200$ an I live in a small town so there's not exactly a place to say hey can yall use your drbii for me or reprogram my com like I don't got the slightest idea I could even bring it too around here