Injector Not Firing

[neonarc77]

I have a 02 4.6L 4x2 Explorer that was idleing pretty bad and very underpowered. I checked the codes and I got lean banks and Injector Circuit Malfunction.

I took care of the lean banks with the intake manifold gasket but I still have the Injector issue. I put a node light to it and it is not firing. I check the wire that goes to the injector and there is no voltage there either.

Does anyone know what this could be? I really have no idea. Thanks.

 

[nascar_intimid]

there is a coil for each cylinder ..maybe the coil is bad for that cylinder?...edit: not sure why the injector won't fire

 

[neonarc77]

Hi nascar intimid, thanks for the reply,

We checked coil and it is working fine. Even switched them and same thing. The issue is that the injector is not getting a signal from the ECM to fire.

 

[nascar_intimid]

I've done some searching on the net and all searches point to ECM problem, not necessarily a replace but maybe a re-flash...good luck!! and let us know

 

[neonarc77]

Thanks nascar,

I assume that only the dealership can do the reflash? Are independent shops able to do this or at least find out if replacement/reflash is needed?

 

[nascar_intimid]

independants can do it...sure. But sometimes a dealer knows a little more about the electronics because that's all they deal with...plus a dealer has a data base of troubleshooting scenerios where an independant won't.
Actually that is how I got my tranny re-programmed with an update by them looking for troubleshootings/fixes that no one else would have known about...so it's your choice but the dealer would be my choice if it is a large dealership, not the old hicktown type...