I have an '05 FX4 5.4L with 85,000 miles.
I bought it used a few months and have only put 10,000 miles on it myself.

I made the following upgrades:

- Banks intake
- High flow cats, 2.5" pipe, X-Pipe, two magnaflow mufflers
- I have a custom tune for the gryphon. The tune was created when I installed the intake but BEFORE I installed the new exhaust.


I drove the truck yesterday with no problems. I get in it this morning and start it up. It started but had the feeling like it was about to die. I let it sit and idle so it could warm up. I decided to drive the 10 miles it takes to get to work. During the drive the I noticed the following:

- Trouble code P2196
O2 sensor signal biased/stuck rich - bank 1/sensor 1
- Violent shaking if the RPM's fell below 2000
- When standing still it was idling rough and felt like it was about to die
- On the way home the exhaust backfired
- Once home I noticed white/gray smoke coming from the exhaust

I got to work and looked up some things online. While I was reading I came across a list of things that could possibly cause the problem. I thought these two were the most likely.
1. Fuel rail pressure regulator?
2. Injectors sticking open and causing the engine to flood with fuel?

I was too stressed about the truck to get any work done so I decided to come home. When I tried to crank it, it took 5 tries before it would turn over which lead me to believe it might have been flooded.

I ran a data stream and came up with the graph below.



I also observed the display and wrote down some of the readings I was getting.

Variable CAM Timing - at idle 0 and -1. While moving 49, 50, 0, 15, 1, -0, 5, 40, 43

Spark Advance - 2, 28, 30, 46

Actual Fuel Rail Pressure - 38.8, 39.1, 39.3

Transmission line pressure - 134, 88, 118, 114, 122

MAF Voltage - .94, 1.17, 1.09, 2.34



Thanks for helping me diagnose this.

 

I can't really be of much help in diagnosing your problem, but the above caught my attention. Have you heard of the injector problems on the 05's? Check out this thread: https://www.f150online.com/forums/20...-warranty.html

Might be of some interest to you.

Good luck!

- NCSU

 

I heard about it when I was doing some online diagnosing today. It is the ford customer satisfaction program 07m08. Thanks for the heads up though

I have a set of injectors sitting in my garage. The stock injectors are 24 pound and these injectors are ford 28 pound injectors. If it is the injectors I suppose I could swap them with the 28's but I was concerned that the 28's would cause the truck to run rich and pretty much do the same thing its doing now.

Thanks again for the reply.

 

I would not crank it up again until you eliminate the injectors as the problem. It can hydrolock and break a rod. Althougth, if it is the injectors and it destroys the engine, it should be covered under Fords extended coverage.

 

Thanks. It will be sitting in the drive until there is a solution to the problem. Fortunately we have a spare car and it can be driven until the truck is fixed.

With the injectors would it be a problem to install the 28 pound injectors temporarily to determine if they were the problem? If I determine that the injectors are the cause I would have no problem getting them replaced back with another set of 24's.

 

That is a question I know nothing about. I suspect it would be ok, but I just don't know. Hopefully, someone will chime in that knows.

 

You can remove the injectors and see if fuel is leaking through. When not running, there should be no fuel. If they stick open, fuel leaks into the cylinders.

 

DIY test is to lift the rail w/injectors mounted in place (rail side). KOEO = Key on engine off/ charge the rail, then check for leaks. A stuck injector will tear drop. Lay some rags down first.

 

What was the final resolution?

I did a Internet search and found this thread, which fits my exact problem to a T.

 

People should follow up with what the fix was. It could be helpful to others.

 

I hear yuh, some, do some don't.

 

The 28lb injectors will be fine without a new tune for the purpose of trouble shooting this issue especially considering at least you can then run the motor with the confidence that you won't hydro-lock it during your debug. The fact that you only have the code on back 1 tells me that it is highly likely that it is an injector, COP, or plug on that side. Good luck

 

You think he's still working on her ? This thread is two years old. In case your unaware lol.

 

x2!

 

Hehe I didn't notice, I just saw it was an active thread not something I searched on.