I have a 2006 ram 1500 with a 4.7 sfi. i cracked The head on it. After replacing Both heads with Valve jobs new timing chain and tensioners now the trucks throwing a fuel injector code . I found a rubbed wire fixed that. Using a mood light I'm Still getting no power to fuel injector number two. Think it's the pcm. Problem is I think The previous owner switch the motor with Dakota engine. If I have to get the PCM flashed can I use my trucks Vin number and mileage or do I have to have the Vin number off of the original truck motor came out of?

 

Is it just that injector? Mice a squirrel love wires. I would look for wiring issues first. The PCM will get flashed to your trucks info.

 

I have traced both wires back to the pcm and found no other issues. Just don't have power to it, thanks for the info

 

the asd relay supplies power on a common feed brown/white wire to all the injectors. the ecm/pcm supplies separate grd to each injector.




if the ASD relay with shut down power to the injectors within 1.8 seconds with key on engine off.


if your seeing power to the other injectors but not #2 the branch that feeds number 2 must be open. Since the feed is common, you can safely run an new power wire to inj 2 from one of the other injectors brown/white power wire.

 

That's my fear I'm not getting a ground from the pcm ( bro/blu) .

 

I would check for dtc;s first and post them.


I do not see how flashing the pcm would help. programming is not going to fix a pcm that grounds 7 injectors and not ground the remaining injector.


follow the diagnostic that for the dtc that is setting. if it leads to this injector, and you have properly confirmed continuity of the injector grd wire to the pcm. you probably will need a pcm.


I assume you noid checked the injector pulse and ohm spec'ed the injector in question?

 

Yes I used a niod light to check the pulse 7 were good. All 8 injectors were within range. I pretty sure I have to replace the pcm just didn't know if I could use my vin and mileage or if it had to be from the truck the motor was originally in. originally in

 

ok. I am a gm tech so I am not sure on the dodge programming. the two companies do this completely different.