I got all 8 injectors changed out today. Tonight we took it to the store and on the way home my CEL came on with P0175. Problem with an injector or something I didnt get hooked back up??? I really hate fixing something only to create a new code.

 

Is this a continuation of the "gassey" smelling exhaust?

Does the exhaust still smell "gassey"

The P0175 says that the PCM has reduced the bank 2 fuel injector "on" time to the minumin and that bank is still running too rich.

If the 2003 is the 5.4 2V, it should have a "returnless" fuel system. I'd look at the freeze frame data to see the load and rpm when the DTC was set, (as well as the fuel pressure if its available on the freeze frame). Your set up should have a fuel rail pressure sensor that the PCM uses to vary the fuel pump speed to maintain the fuel pressure under different operating condictions. Comparing the LTFTs for Bank 1 and 2 would give a hint if bank 1 is also near the limit, in which case the fuel pressure may be the issue or possibly the MAF is dirty (as they would affect both banks).
If bank 1's fuel trim is well within normal limits, you may still have a leaking fuel injector on bank 2.

 

It smelled gassy the first startup after I finished the job, but I figured ut was residual from sitting overnight + dumping fuel when I pulled off the rails.

Here is what I got...

Fuel Sys 1 CL
Fuel Sys 2 CL- Fault
Calc Load 26.27%
ECT 168
STFT B1 -9.38%
LTFT B1 -15.63%
STFT B2 -10.94%
LTFT B2 -15.63%
Eng RPM 785
Speed 27

 

Okay - looks like the fuel system for both bank 1 and bank two are running in closed loop, but bank 2's HO2s shows a fault. That O2 sensor may just be dirty due to excess fuel in the exhaust. Was the #8 injector that was leaking before? If so, that might have affected that sensor.

Did you reset the fuel trims after changing the injectors? If not, a portion of those LTFTs could be left over from before (but the STFTs are showing rich).

The DTC was set with the throttle closed at an idle rpm while traveling at 27 mph. The engine was not yet fully warmed up, being it was only 168*

The fuel trims show that both banks are running rich at idle, its just that bank 2 passed the threshold to set the P0175 code for bank 2, but bank 1 is nearly as rich as bank 2. I'd look for something that is effecting both banks. A dirty MAF could cause matching negative LTFTs at idle, yet have positive trims at higher RPMs and load. It might be worth taping your fuel pressure tester to the windshield and watch the fuel pressure over various driving condictions to see if it spikes.

Check your scan tool to see if it can display live data for PID

If your scan tool can display live LTFTs, monitor the trims at idle, then run the engine up to 2000-2500 RPMs and it should display the LTFTs for higher RPMs, to see if they get better. It might be worth a few minutes to clean the MAF if it hasn't been done.

Sometimes running a good fuel cleaner will clean up a dirty O2 sensor (and maybe save a cat that is loaded up from excessive fuel).

Are there any other DTCs present?

 

Nope. no other codes.

Tomorrow when there is light, I will check the MAF for sure. It may have gotten a good coating of dust when I was blowing the engine off with the compressor. I did unplug the TPS to give my hand more room, and I will check to make sure that got plugged back in good.

Honestly, I am not sure which injector was leaking.

 

Went out and disconnected the battery, then made sure everything I unconnected yesterday was seated good, cleaned the MAF really well and took it for a drive. I drove more than I did yesterday and harder on the highway and it hasn't thrown the code again. Hopefully it won't come back.

Really pondering getting rid of this while there is no CEL and I can still get a little value out of it.

 

Nevermind, it came back


Fuel Sys 1 CL
Fuel Sys 2 CL- Fault
Calc Load 69.41%
ECT 190
STFT B1 -0.78%
LTFT B1 -21.09%
STFT B2 -3.13%
LTFT B2 -21.09%
Eng RPM 718
Speed 0

 

I went ahead and took it in to the dealer this morning and they have had it ALL day. The could find no problem that would cause it to run rich other than the new injectors. I took the old ones back out so they could reinstall them and take a look at it before I jacked with it. They said there none leaking and they reprogrammed the PCM and its running great now.

Of course, we shall see.

 

did u fix the problem?
if so, what was it?
ive been dealing with code for a very long time and i have replaced som many things

 

My problem was due to getting the wrong injectors. They were dumping too much fuel. I had the dealership put the old ones back in and they reprogrammed the PCM while it was there.

Since this problem I just got rid of the damn thing and got a 2012 F150 Ecoboost.

 

I had the same problem on my 04 250. I had a bad coil pack. Replaced it and runs great now.....