Hi Guys,

I've got an '03 F150 7700 with the 5.4L V8. Starting this morning it's been running rough, I suspected a miss, and after a quick 3 minute drive to the mail box and back it threw a code:

P0302 Cylinder 2 Misfire Detected.

Freeze Frame Data:
Fuel Sys 1 CL
Fuel Sys 2 CL-Fault
Calc Load% 24.31
ECT 78
STFT B1% 6.25
LTFT B1% 1.56
STFT B2% -1.56
LTFT B2% 1.56
Eng RPM 589
Speed 0

It rained lightly last night, and has been humid today. There is no moisture in the engine bay. Also, the truck was parked at the airport for 5 days previous and I drove it home from there last night (85 KMs) with no problems. It seems to idle all right in park, but really idles rough when reverse or drive is selected. Running at low speed yields some significant hesitation.

Can anyone help decipher the freeze frame for me? I will test the coil packs tomorrow and post with results... could the fuel sys 2 cl-fault be an injector issue???

any assistance is greatly appreciated.

FOD

 

go buy a coil pack and put it on cylinder to thats ur problem... im 99% pos. number 2 is on passenger side.. 2nd one in. simple switch i bet its the problem.my truck has gone thru 5 coils since i boutght it lil less that 2 yrs ago... but yeah haha that the culprit

 

Update:

I took the coil pack off, and the tested it's resistance as per the hayne's it all checked out, but it was really wet. Strange. put it all back together after dying it and cleaning it. Still misfire on startup and misfire no.2 detected. So took it all apart again, left the sparkplug in and used compressed air to blow out the hole. Wow was there ever a lot of water in there, running good now. gonna go get dyelectric grease on monday and coat the whole assembly generously and see if that keeps the water from getting at the connections.

thanks for the help.

fod