P0266 cylinder 2 contribution, miss fire when cold

[Ford460power]

Recently started having a rougher then normal startup, has always fired up smooth and fast. No smoke of any kind on start up but it runs rough, noticeable miss fire. I checked and get a p0266 code. Truck runs like **** until it warms up then the miss fire clears up and truck runs great.

In thinking that with 201k miles and no idea if it's ever had injectors changed, that I might just have a bad injector.

Question is I have wanted to upgrade to Warren diesel 175/30 injectors, if I remove all 8 and send them in, will they be able to repair my one Injector that is misfiring? Or will I need to get a new injector?

 

[ghohouston]

Yes, you need a new injector. I believe you just send in your core, and they send you a new one. You should also check ficm voltage to make sure it usnt slowly killing your injectors.

 

[Ford460power]

I monitor ficm volt with my CTS and it's always at 47.5 to 48v

I'll get in contact with Warren diesel and get all eight pulled out and sent in.

 

[Ford460power]

I used a snap on scan tool and it passed the buzz test, now has no no codes, and everything data wise looks good.

Truck was warm when I ran the test, and it was running great no miss fire. This morning when I started it up it was rough no smoke, but still had the miss fire. Im going to let it sit overnight and run the scanner when it's cold and running rough to see what happens.

 

[ghohouston]

You need injectors. You can switch oil to 5w40, but thats just a temporary bandaid. 6.0 iniectors wear out fast.

 

[ghostriderblk]

Recently started having a rougher then normal startup, has always fired up smooth and fast. No smoke of any kind on start up but it runs rough, noticeable miss fire. I checked and get a p0266 code. Truck runs like **** until it warms up then the miss fire clears up and truck runs great.

In thinking that with 201k miles and no idea if it's ever had injectors changed, that I might just have a bad injector.

Question is I have wanted to upgrade to Warren diesel 175/30 injectors, if I remove all 8 and send them in, will they be able to repair my one Injector that is misfiring? Or will I need to get a new injector?

Doesn't that sound like stiction? Ether way I think new injectors it the way to go. Unless you have skill and time to check yours

 

[Ford460power]

Yea I'm thinking stiction as well, this last oil changed I used just regular Mobil 1 15w40, and have noticed since it hasn't liked it. I've normally been running delo 400 synthetic and it's seemed to like it the best.

This morning though it was about 58 degree, truck fired up smooth no miss no rough idle and ran awesome. I'm going to drain oil and change back to the synthetic and see what happens. I have a spare set of injectors, I'm going to send into Warren and get the rebuilt to swap in.

Hasn't thrown any codes besides the one p0266 last week, and it hasn't come back yet. Either way looks like I'm due for injectors.