For what it's worth, the issue described by the original poster may NOT be found by running an injector buzz test. The ONLY way to detect the sticking injector(s) would be to connect Ford's IDS (or any generic scan tool that can run what's called a "power balance") WHEN THE VEHICLE IS COLD, and start the engine as the symptom is occuring. Running an injector buzz test will only produce a PASS result.
Concerning the part in blue above; is it easier to diagnose injector stiction in colder weather (winter), as opposed to the warmer months?
I am having very similar symptoms as the OP with a 2006 6.0L with 142,000 miles (loss of power at initial startup, very difficult to start in cold weather, however once the engine gets some heat to it, seems to smooth out and run decent. Strong fuel odor out the tailpipe, and MPG has suffered badly. I used to get 19 mpg on the highway, now I am lucky to get 15 mpg. Also noticing black smoke out the tailpipe, like it is having an overfueling issue. Once engine is warmed up, the loss of power is still noticeable, although not as bad at intial cold startup.)
This leads me to think it's being caused by sticky injectors, and I'm almost certain I need some new injectors, but don't know how many, or how to properly check which ones are bad. Am I better off to wait until the weather starts cooling down again in the fall?
Could you OHM test each injector individually to make sure the solenoids are within spec? I'm referring to pins 1,2,3, & 4 on the pigtail from the injector. What is the proper OHM reading I should see, and which pins are paired?
Also, not sure if related or not, but my FICM went bad just a few weeks ago and I had a no start condition. I have replaced the FICM and reflashed all modules to latest calibration and symptoms have lessened, but are still there. Could a bad injector cause a FICM to fail?
Prior to the FICM going bad, I did an oil and fuel filter change. Symptoms were far worse after a fresh oil / fuel filter change, than the old oil that had 5000 miles on it and fuel filters that had 10000 miles. Not sure if this tells you anything, but why would it run
worse on fresh oil & fuel filters? :dunno:
Sorry for the longwinded post! :tard: