have you sprayed anything around the intake to see if its possibly leaking...i know its common on fords...also try switching coils and see if the misfire jumps cylinders...i've seen quite a few new coils, especially aftermarket, that are defective...and based on the DTC it sounds like you just have a bad heated o2 which should be an easy fix

 

Latest computer test showed #5 cyl misfire 2 new plugs & 2 new differnt cops & 2 new diff ejectors, what more can I say, getting my adapter hopefully tommorrow they ordered one otc #5607 14mm. then I can finnally check it Thanks for the input...

 

OK now what I have #160lbs of comp in #5 cyl & it holds right there no leaky, so what the heck is wrong with this thing ?????

 

Wiring to the injector or cop?

 

yeah my brother in law siad he has a tester to plug into the harness I guess thats next step.... other than is there anything I can look for it looks ok to me?

 

does anybody know what the tester is called to plug into the harness to check voltage if it is getting to coils ??

 

if you switched coils and the misfire didnt change cylinders then you should be able to rule out a coil or harness issue...did you ever check for an intake (plenum) leak?

 

You have ruled out the coil but you have NOT ruled out the harness.

 

true, nevermind...damn glc keeps correcting me! lol, j/k

 

I dont know what to check on the harness, hoping brother in law will help but dont like to bother him if I dont have to, any how I find it hard to beleive that a misfire in 1 cyl, makes this truck so under power & causes the limp mode part ? I feel theres more, no I didnt check the intake yet its so cold again here in MI snow is back & makes it hard for me to pull it in the garage, how do I check the harness ??? Thanks guys..

 

Took my brother inlaw for a ride to show him how it goes into limp mode, he checked wires all cyls r firing so we r leaning towards clogged cats....

 

seeing i have over 1000 readers I would like everybody to know, took covers off to do cam phaser & everything else, & was looking at # 5 cyl which always came up as a misfire & found a cam fowler laying up on the head , no damage , the roller is wore out very loose must be how it poped out ? anyhow now I have to fix that no wonder it didnt have any power... wish I could do cams & all new fowlers but I spent so much lately....

 

Well I have cam phasers off & chains & guides & tensioners which one was bad, guides have very litlle wear, the engine is very clean just that bad cam fowler, & tensioner, my big Quistion is should I replace the phasers or save the 300 bucks I for sure will do the rest ?? I will call a dealer to see if it was done by looking up my vin? or should I replace the phasers no matter what thanks guys ...

 

I wouldn't replace the phasers unless they're making noises, or if its higher mileage and you're in there for something else

 

Did you drop a plug before install? Could be a cracked porcelin.

What brand coils?