Last year I changed (all at one time) the following parts:

Turbo- 38R
uppipes
Non Epbv pedastal
glow plugs/relay
UVC harnesses
Injectors-Reman single shots
Regulated return.
IPR

After a year of driving I'm having a problem that is progressively getting worse. On cold start, HPOP pressure 400-600 psi(I have a guage) however once the oil temp comes up it will barely idle in stock tune and I must switch to either my tow tune or 80E to make it idle. On top of that it just has no power off idle. With an empty truck I must give it a little fuel when I release the clutch something I never had to do even on a hill with the stock set up. The other problem I have is high EGT when towing on hills. I'm thinking I have injector o ring issues or maybe a bad injector itself. I do not have AE(funding issues at the moment) but is there any other way to isolate what the problem could be? Thanks in advance!

Duncan

 

Start the engine with you valve covers off and check your injector spouts for one with a stuck valve that is continuously bleeding oil.

 

Would the stuck valve cause high EGT's?

 

Low ICP can cause everything you describe... and it is the easiest to test without AE. Pull the connector to your ICP sensor and see how that plays out with idle.

 

Possibly if you've got low oil pressure and not getting good fuel atomization.

 

Can I ask what is a good ICP and when can it be considered low? Thanks.

 

Finally ordered the AE and hooked it up today. I found these codes:

Buzz test
P1271 High to low side open cyl 1
P1272 '' cyl 2
P1274 '' cyl 4

P1282 Excessive ICP

KOEO
P1316 Injector circuit /IDM codes detected
P0475 Exhaust back pressure
P0470

KOER
P0269 Cylinder 3 Contribution/Balance fault
P0284 Cylinder 8/ Contribution/Balance fault

 

This is likely a "hangover" from before your UVCH replacement, but it could be an issue with the 42-pin connector or the VC gasket.

Long story, but: Weak HPOP can do this, tune can do this, UVCH can do this, ICP or IPR can do this, or it could just be a "stale" code. Have you cleared the old codes and started fresh?

EBP cleaned? IDM details in your first list - UVCH

If you have a gray CPS, ignore this for now. Mine was cured with a CPS from Clay.

 

470-500 is stock idle, and 2800-2900 is hair on fire.

 

Thanks for responding...No...I literally took it out of the envelope, had some trouble loading it on my daughters netbook(had to charge the battery of said netbook). I will have more time to mess with in the am. I replaced the UVCH and gaskets with new IH units. Does the 50 cent mod still have to be done with the new stuff?

 

my EBP is disconnected...

 

I was driving the other day, engine not fully warmed up, and every time I would add throttle the SES would light. This happened a few times and eventually it started running that total crap. Looked down saw that my F5 display was blank, I was running on the stock tune at the point. Found a safe spot to pull over, shut the truck off and restarted and all was well from there on. Pulled the trigger that day on the AE.

 

Nope, you're good. With your other answers, we're not going to catch what happened the other day because of the backlog of old codes. You'll need to clear all the codes (using the procedure I set up in the AE class [LINK]), then if that little bugger shows up again... you own his ***.

You can always run a fresh buzz, KOEO, KOER, and data-log a short drive. You want to have a baseline, so if something happens... you have this information to compare with.

 

Ok... Thanks for that. I'll clear the codes, run the tests again and post my findings. Thanks again!

Duncan

 

Cleared the codes this am. Performed buzz test on cold engine. No faults found. Started truck, idle smoother, seems to run better. All good, no return of codes except for the EBP ones. However, it is still doing the original problem.

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