04 nissan pick up fuel dumping from exhuast

God bless you my brothers and sisters.
I have this 04 Nissan pick up engine ka24e truck came in with a busted timing chain that was installed at another shop. This time customer wanted to rebuild engine after all done I have smoke coming from exhaust and fuel dumping from exhaust. I checked the injectors and the #2 was wired backwards at the plug. I don't know if it make a difference.What does make a difference is that on injector #2 with key on I have gnd n signal wire and on the rest no.Question here is this a bad ecm because with key off and test light to power it does not light, only with key on. Here are some pics of injector plug unplugged at time of test and also spot on ground of fuel leak. Thank you for your help.

So do I understand correctly that the white/blue wire is an injector control wire, and that it lights the test light steadily with the key on? :blink: If so, I'd agree with ECM problem.

To be clear, #2 is the only one that does this? Do the other injectors work correctly, or not at all?

You're getting all the problem Nissans these days, huh? :silly:

God bless you my brother and sisters.
Yes Tyler that is correct the wht/blu is control others wire wht/blk is power. Also yes on that the only one that does this is the #2, #1#3#4 with key on test light to power it does not turn on.



LOL yes Nissan is keeping me busy I wasn't able to fix the sentra I failed the costomer:(

God bless you my brothers and sisters.
Monde im sorry that I didn't mentioned this but I live in Mexico and if I say 04 in the USA it's a 97. At least that is the diagram I'm looking at.

Gilbert, saludos desde México tambien.

So if you get a permanent ground with key on engine off at the wh/bl wire and this wiire is not shorted to ground as indicated by the test light not lighting at key off, then yes, your ecu is suspect number 1.

Is the permanent ground present at this wire with the engine running as well? If so the injector is dumping fuel all the time.

To confirm this is your problem and there is no other problem regarding the excessive fuel you might want to cut the white/blue control wire of #2 injector and connect temporarily the end of it that is connected to the #2 injector - not the end that comes from the ecm and is shorted! - to the control wire of any other, normally working injector.

Saludos amigo, If you need more help you can pm me, in spanish.

juergen.scholl wrote: To confirm this is your problem and there is no other problem regarding the excessive fuel you might want to cut the white/blue control wire of #2 injector and connect temporarily the end of it that is connected to the #2 injector - not the end that comes from the ecm and is shorted! - to the control wire of any other, normally working injector.

Slick idea.

gilbert wrote: LOL yes Nissan is keeping me busy I wasn't able to fix the sentra I failed the costomer:(

Ah don't worry sir, it happens to all of us! I just happened to have a Nissan 350Z kicking my ass all this week. :lol:

God bless you my brothers and sisters.
Monde I did as you asked disconnected the PCM and test light to batt. pos. test light didn't turn on only when PCM is connected and key on. Here or some pics also of #1 injector with key on.

First two pics is showing PCM disconnected injector #2 also disconnected test light to bat.pos and light does not light.

The third pic is PCM plugged in test light to bat. pos. injector #2 key on test light lights.

The fourth pic is the #1 injector key test light to bat. pos. test light doesn't light.

Now I have to tell the customer and see what he wants to do.
Thank you all for your help.

Gilbert, I dunno how you did it man, but you have the most beat up looking test light I've ever seen. :lol:

I meant it as a compliment - I usually mutilate or destroy most of mine before the plastic has a chance to show wear.

God bless you my brothers and sisters.

:lol: :lol: :lol: :lol: :lol: :lol: It's been crazy glued to many times brother.