Ok, so I've been posting for the last week about a runability problem I'm having. It acts as if there is no boost. I removed and cleaned the turbo today (I hate removing the turbo) to no avail. The truck starts and idles just fine, I can rev the engine in park with a light throttle and it goes up clean and smooth to 2500, but if I depress the pedal any further it goes into a chugging and huffing blue smoke. It feels like spomething is plugged up and not letting it spin up. I hooked up the AE and the only thing I see is the CMP/CKP are going in and out of sync almost rythmically but not rapidly. I even plugged the EGR back in, the fan seems to come on more noticably now, but the truck still won't get out of it own way. Does great downhill though! Is there a chance that either the CMP or CKP can fail and not set a CEL? Any thoughts or suggestions are REALLY welcome!I'm lost at this point. By the way, the HPOP, ICP and IPR were replaced about a year ago and they are all responding and reading properly. FICM is reading 48 - 48.5 (even when the engine seems to be chugging) Is there a chance that the TPS could be stuck not letting the air flow properly into the engine?

 

Have you checked your fuel pressure? I don't remember from previous threads.

 

No, I haven't, I have no gauge to do so and the parts houses here don't sell them. The severity of this issue came on rather abruptly though, you think it might be fuel pressure?

 

My number is 918-453-1225 or I could call you if you have time?

 

918-453-1224

 

Does it sit and idle or will it eventually sit there and die?

 

ok wich pid are you watching.
sync or ficm sync.
also look at rpm and cmp fault pids.
this could be a case of a possible bad sensor. a damaged tone ring , or a mian engine sensor harness

 

I'll have to look again, but I believe that there is only 1 thing to watch on the AE as far as CMP/CKP sync goes. Are they supposed to stay in sync as the engine is running? Seems to me like they shoud. Tone ring doesn't sound fun to change, Is there a way to isolate it as the issue or not? Also, I have yet to find a way to get the AE to monitor the EBP, but from what I hear others saying, the AE does a lot more than I have figured out how to do with it.

 

you need a 2 channel lab scope for the tone ring test. if its bad you need a crank shaft. odds are not you concern.

just unblug the ebp and try it see if it gtes better.
the pid for ebp should be ebpa but being an 04 you may not use that pid as ebp is calculated and a real number on that truck.

 

I tried unplugging it last week and it made no difference. The truck is an 03, february 03 build I think.

 

NPCCPARTSMAN, suggested it might be a bad fuel pump, I don't have a pressure guage though, plan on getting one this week if I can find one in Tulsa.

 

The cmp / ckp sync keeps fluctuating from yes to no. The FICM info for sync remains as YES. CMP says it is not faulted. The KAM shows faulted though, even after clearing the codes and re-running the AE for DTC's

 

Update; I cleared the codes and reset the KAM, ran the engine at idle and tried to drive it up the road, same low/no power issue, but NO DTC's. If there was a low fuel pressure problem would I not see it in the form of a spike or valley on the power balance test (AE) or would it not show up as a miss with a DTC? I unplugged the vacuum hose to the MAP sensor and nothing changed in runability, nor did it set a code, also unplugged the EBP with the same results (no change and no code). The only code that is showing on multiple engine runs and "test" drives is the OBD not completed code. I will continue as npccpartsman suggested and get a fuel pressure guage to check actual pressure, but if anyone can think of something else to check, please let me know.. Thanks, I do appreciate all of the help.

 

You have to have a starting point and fuel pressure is one of them with the miles you have on the truck. Keep us informed.

 

Will do. Kind of a catch 22, spend the money on a fuel pressure set-up or just put that money towards a new pump.