Hey guys, here's what I got going on. I changed my injector o-rings a week ago because it was dumping oil in the fuel. While I was in there I went ahead and changed the glow plugs along with all the wiring harnesses and valve cover gaskets. Also, everytime I do injector o-rings I wire brush the nozzles to get the soot off of them. The truck ran perfect when I pulled it in the shop. Had plenty of power even with jacked up injector o-rings.

Now, after changing the o-rings, it starts and idles just fine. Get it out on the road and it barely has enough power to get moving in second gear, it will barely get the turbo spooled and barely smokes at all when it's not under boost. It usually smokes quite a bit before the turbo comes on in the drag tune if you floor it. It seems like it just won't fuel..

All the oil spouts on the injectors are spitting plenty of oil. Getting plenty of ICP, IPR DC % is good, got 65psi fuel pressure, Cody and I checked continuity on all the valve cover harnesses and I ohmed them all out and got between 3.0-3.4 ohms on all of the injector pins. We pulled the map line off and plugged it, made no difference. Unplugged the map sensor electrical connector, no difference. Unplugged ICP sensor, no difference. Changed the MAP sensor and IDM with no difference.

Buzz test still gives me bank 1 and bank 2 high side open, so I'm going to pull the engine harness and change the UVCH pigtails on it next and check the wires throughout the harness. Everything under the valve covers checks out fine and there is a known good IDM in it right now. I kinda wonder if some nozzles are clogged or something after I wire brushed them.. I'm confused at this point, so if anyone has any ideas, I'm all ears. Sorry about the novel, just tried to give as much info as possible.

 

You mighta done it in with the wire brush.

Those holes are soo small and if you took some of the burs and folded them into the nozzle hole, it would mess it up.

 

Did you change pig tails or just UVCH and gaskets ?

 

I also think you could have clogged the tip...I used a plastic scuff pad when I did mine ....one of those green 3M deals and also added some Ford Lubricicity additive to the filterbowl and fuel tank ....MIne were over 280K when I did them ....Maybe add seafoam to the tank and engine oil ?

 

Well if the wire brush did it, that's a first for me. I have done that countless times. Lol.

I have not changed the pigtails on my engine harness, only the UVCH and gaskets. All the wiring under the VCs is good to go. I ohmed them all out and we checked continuity on all of it. The only things I can think of is the pigtails on the engine harness or the nozzles got messed up.

 

I'd have used a brass bristle brush.

 

STupid things like this happen to me always.

Hence my post about the cleaning parts vs not cleaning.

 

Well I think I'm going to go through the engine harness first and put new pigtails on it first. I discovered one pigtail has been changed and has butt connectors attaching it and one glow plug wire is missing some insulation. So I will change those and hope for the best. If not, I guess I'm going to upgrade injectors. Lol

 

350cc hybrids comin? :P

 

Could the Injection Pressure Regulator be gummed up?

 

Travis I wonder if those butt connectors are loose now that you messed with the wires.

The reason I asked was when I did the SD UVCH I got number 6&8 mixed up and it started and idled fine but was gutless.

 

You got me Travis, I wish I could help, good luck!

 

I wire brushed mine with a small brush about the size of a tooth brush. I don't think brushing them would hurt any thing.

 

Started to reply, then realized I was looking at the wrong year (someone else's computer). Look at that last link in my signature and it might help.

 

If new pigtails on the harness don't do it, I will mess with the injectors. Depending on funds, I might go to 238/100s and go ahead and do the head studs. Lol. If I dont have the money for hybrids, I will just put 100% nozzles on these injectors.

I'm hoping it's the harness at this point. I don't really want to mess with the injectors until I have a built engine, but we will see. The pigtails need to be replaced anyways, so I will do that and if that doesn't work, I guess I will have to build some injectors.