6.0 P0284 code

[ASokolnicki]

I've had a series of problems with this truck, it has 173k on it. I recently had the #5 injector go bad, I ordered a reman set and reaplced them all, all new o-rings and fire seals. Put the truck back together and now have a miss on #8, I did a scan with the AE (Auto Enginuity) and it did not pass the buzz test for #8. I swapped out the injector with one of my originals, no change at all. I swapped out the FICM with a known good one and it I didn't see the code come back, this morning while driving to work (5 miles after swapping FICM), the miss returned and the same p0284 cyl. #8 contribution fault code returned.

This truck has had the following recently updated/upgraded.

-FICM/injector harness
-new IPR
-STC fitting
-cam/crank sensor
-stand pipes/dummy plugs
-8 reman injectors.


Any ideas???

Thanks in advance!

[dannyboy950]

Check the wireing to #8 for a short or open circuit. Voltage is not reaching that injector.

[ASokolnicki]

I'll have to check it, the harness is 6 months old, brand new from Ford so I really doubt its a short in the harness, I checked and cleaned the pins on the injectors. Just a continuous stream of problems with this engine, at least I do all my own work and don't have to pay outrageous labor charges, just very frustrating!

[kaya@bernhausen]

since you said swapping the ficm worked for a short period, i'd suspect a bad connection at the ficm or a spot that has chafed/pinched. have a very close look at the ficm connectors and pins. make sure none have receded. inspect the rest of the harness carefully as well.