ok new here hope im in right place ive read many other posts like mine but no help so heres the deal about for days ago started missing threw po303 so i put injector a new cop and all new plugs no help had a new mas so stuck it on and cleaned throttle body it did change a bit but it misses really bad at idle and slowly into it but clears up if you rev it up it has all new cop boots someone else done and the cats have maybe 300 miles on them i did vaccum check its fine did comp test its fine checked o2 sensors they are fine any other sensors i can check i used to be a mech so i know my stuff but this has me stumped any help is app thanks sorry for the long paragragh just trying to touch on everything thats been done i had someone tell me to check the ias but havnt yet

 

Only help I can offer is...PUNCTUATION

 

thanks for that info but thats def not what im looking for dont need attitude i need help

 

At least he put in his truck year and motor size.....that's more than what most do....

 

You might want to change out all the cops.....ebay has a couple of stores that sell them really reasonable.....check out global or uneek for the stores....

 

I'd do a compression test.

 

thanks for the replys i did do a compression test all cylinders were fine and as far as the cops i took a new one and put it in every cylinder and no change is there away to check the current to the injectors i also heard that the pcm may need flashed but id like to see if the injectors are getting right amount before i pay for that

 

Have you tried putting Techron in the gas? You may have a dirty injector and that may help.

 

yes i did i also took all injectors out and cleaned them

 

This is true, however the op cannot communicate any better than a 2 year old !!

 

Sure are a ton of A-Holes on this site. The guy is asking for help with his truck on a specific problem he's having and has given quite enough information to expect a decent reply. However, what he gets in return are some a-holes that think they're some almighty internet grammar police. This is the exact crap that kills good websites like this USED to be. Now, its full of posters like the previously mentioned; and this initiator of this thread still doesn't have a decent, respectable reply.

To reply to the op, it sounds like you've checked all the likely areas. Since your still getting the TC, I'd take it in and have a Ford-Certified mechanic do some tests.

 

yeah it looks like im gonna have to take it im lost well i thank everyone for the replys

 

Hello all, I had a similar gremlin in my 06 5.4 w/136,00 miles, I gotten a #4 misfire. i started out with the spark plugs, cops, a fuel sending unit (the box shaped unit next to the spare tire) all with no avail. As a last ditch effort i changed the fuel pump, that seemed to have fixed my problem. It wasn't fun changing it out in -5 to -10 degree weather but after a week so-far everything seems to me running smoothly... I figure that I'd share my findings with whomever it might help in the future.

 

Oh i forgot i also replaced the #4 fuel injector befor the pump.