Ok I have a 2004 early build. Truck was running good until HPOP went out. I replaced it along with oil cooler. It's running now but I get a P0275 contribution. Noticeable smoke from exhaust. Smoke is kind of white to light grey. Noticed while driving from 50 to 60 mph it has a stutter.

I have checked continuity on the injector harness to #5. The plugs are in good to ficm and injector. FICM hasn't dropped below 46v. ICP and batteries are less then year old. Also getting a lot of oil from ccv which I never had an noticeable oil before pump change. What should I look at?

 

Most likely you have a leaking or failed injector. You might pull the secondary fuel filter and fuel pump fuse and have somebody crank the truck while you watch for bubbles in the filter housing, which would indicate a leaking injector.

 

Guess contribution test would also be good to run?

 

SHURE IF YOU HAVE THE ABILITY ^^^^^^^

I am shure Tim would have mentioned it if he knew you had a AE

 

yes, and check your oil level

 

Well I don't have AE but I have a mechanic friend that said I could run by his shop and do it. Gives him a chance to use his new scan tool since his last one was stolen.

 

Not sure if anyone near you has an AE, but if your truck can make it, I can meet you halfway in Buffalo one evening if not sometime on the weekend.

With the AE, I'll be able to pull codes and perform the tests necessary to determine exactly what the problem is.

 

SWEET DEAL RIGHT HERE^^^^

 

Ok wasn't able to get my contribution test done but I noticed something on my scanner today. The cylinder miss fire count was going off on 5 and 7. 7 was much higher then 5. What would this tell me? Bad injector seal or .......?

Going to try and get it over to a place and get the contribution test tomorrow.

 

Very much appreciate the offer and I'm sure my truck could make it but I'm not sure I want to push my truck.

 

Just an update still haven't been able to get a contribution test but now have a P0307 code.

 

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Looks like you have a Bad Injector on Cylinder #7

you can Bubble test it or Ohm the Coils Out Both of thses test would be a Compleate picture

 

Ok did bubble test didn't see any thing. Had the old fuel pressure spring and upgraded to blue spring. Seems to idle smoother but still lacking a little get up and go.

I'm getting oil from ccv into my intake and don't have white smoke its a light bluish smoke. I have noticed that between 1500 to 2000 rpm it doesn't like that range especially when going down highway from 50 to 60 mph.

I'll check codes again tomorrow. Any other thing I may need to check? I know my ICP wasn't leaking oil when I replaced the HPOP. I replaced that less than year ago.I'm sure I missed something.

 

Been reading and I'm wondering about this check valve that is on the high pressure oil rail. Does anyone know anything about it?

 

A check valve AKA standpipe would affect the whole injector bank, not just one or two cylinders. I'm thinking leaking injector since the codes indicate the cylinders are next to each other. You need to pull the back two passenger side injectors to see what's going on.