6.0L misfire when cold?

nchappy · May 13, 2013

2006 6.0L stock

Right after oil and oil filter change (schaeffers 5w40 syn), and fuel filters changed (motorcraft), it developed a misfire when cold. Would start and idle fine, but stumbled under moderate acceleration until fully warmed up. Once warm it runs 100%.
I double checked all filter gaskets...

Shop says 3 injectors are failing.

Can the injectors act funny when cold but fine when warmed up?
Any other thoughts I should follow up on?
Thanks!!

kyle43335 · May 13, 2013

Yes you have injector stiction. Get yourself 2 bottles of rev x and dump it in the oil and drive.

Should clear it right up.

Dave · May 13, 2013

Congrats you likely have injector stiction.

Check your FICM voltage. IF that doesnt cover it try some rev x

sootie · May 13, 2013

yes- most likely injectors. try running some rev-x thru it and it may clear up.

do you have a monitor of any kind?

ICP pressure and fuel pressure would be good to know as well.

there is a good thread in this section about "stictition" which is what you are experiencing.

on edit: treed :doh:

nchappy · May 13, 2013

OK
Thanks!!

nchappy · May 13, 2013

Got any PSA rev-x vendor recommendations?

INFAMOUS · May 13, 2013

Contact Paul at Complete Performance!

Sent from my SCH-I535 using Tapatalk 2

nchappy · May 22, 2013

Yesterday was my 1st cold start up with rev-x and no misfire...

Mdub707 · May 22, 2013

Just curious but what oil were you using before? What oil filter brand? I did an oil change once to a different oil type, truck immediately ran worse and had a rough idle and bad injector stiction. Not to say it didn't have some before, but it got much more noticeable with this new oil type. Same oil weights, just a different brand.