Hello my name is Renee and i am from Texas. I have a little problem that i need help with. Its on my 1987 Chevy Silverado with a 2003 6.0 and 4L80E trans that i put in myself. It is my project that i got running. I'm not a certified, but i know alot in mechanics, but can't seem to figure this out... My problem is #8 injector keeps dumping fuel. I have replaced the fuel regulator and the injector 3 times to see if this would help. And no luck.. I checked the plug to the injector with a noid light and its not pulsing. The light just stays on. I have checked 1-7 and they are firing properly. As soon as i connect #8 injector gas starts coming out of the header this is, because i have not completed the exhaust system yet. I am wondering if it could be the computer thats not grounding #8, but i am not sure. Can someone tell me what i need to do to fix this problem.


Thanks,
Renee

 

sorry to hear that your having so much trouble and welcome to p.t.
I would swap coil pack harness from head to head and determan if it is that part of the harness or the other existing harness towards your computer.

 

ok ill give it a try if the driver side starts acting up then its got to be the computer hey my computer isnt tuned yet do u think this may be part of the problem i do have 2 oxygen sensors hooked up there on the collector

 

Could it be possible that your wires are swapped? What did you use for a harness? The ECM sends a ground signal to allow the pulse. Has it always done this? I like the idea of swapping coil/inj harness' side to side.

 

i used the original harness to the 6.0 its only three wires to make it work after u get the vats removed ,It wasnt always doing it i left the truck parked for a month and then it started doing it im stuck here

 

try swapping a couple of inj around. Then you'll know if its wiring or injector. It doesn't make sense that it could be gummed up over a short time like that, but maybe it has some junk in it.

 

ive already tried it and still nothing

 

If you've checked it with a noid light and it is staying constant, it is not the injector itself. It sounds like you have a broken wire somewhere, or maybe a loose pin at the PCM maybe.

Double check all your grounds and look for broken wires along the harness.

 

i really appreciate the help fellas im going to check it out here in the morning

 

as stated above, if your noid light is lit contant its not the injector.the pink wire is powered 12v while ign is on and while cranking. pcm grounds the dk/blue & white #8 injector to turn it on.(thats on a 02 6.0 harness) should be the same on 03. i would disconnect pcm harness and check with an ohm meter the dk/blue& white wire to see if it is shorted to ground.if that checks ok i would suspect the pcm for a faulty injector driver. good luck!!