StaRted a couple years ago here is what been done
• New fuel filter
• New universal cat converters
• Ing. coil #4 removed & replaced
• Spark plug cylinder #8 with spark trail coil boot was defective replaced coil boot.
• New spark plugs put in.
engine codes at Autozone say its the Cat converter
Its progressively getting worse especially at 45-50 mph and at 70 mph
you have to let off the throttle a little and then gradually give it some more gas.
Should I take it back to the garage where I started all the repairs or take it in to the Ford Dealership? Sorry this is long I'm new here too.

2005 F-150 FX4 173,000 Miles V-8

 

https://www.f150online.com/forums/v8...ram-07m08.html

When telling us there are codes, you must post the exact code numbers, not what Autozone says they mean.

 

1. Post all the actual codes - not some counter guy's interpretation of them.

2. Read these:

https://www.f150online.com/forums/v8...-new-user.html

https://www.f150online.com/forums/v8...-problems.html

May want to find another shop....

good luck
MGD

 

GLC That link is not working anymore. Is there an updated link?
OEM Cross code from auto zone PO430 Definition:
Catalyst efficiency low-bank 2 The oxygen sensors monitor the catalytic converts ability to store oxygen.
Probable cause
• Catalytic converter defective. failure to possibly #2,3 or 4
• Engine misfire or running condition
• Large vacuum leak
• Engine oil leakage into exhaust-valve guide seals, piston rings
that what the Autozone ticket read.

Thank you everyone.

 

That letter ( PDF) is linked to within the first thread link I posted. Did you not read those links?

Leaking injectors can induce misfires - and destroy cats.

MGD

 

The link works in post #61 in the thread I linked.

 

Thanks GLC printed off the .pdf file. Should I take this pdf file to a dealership and see if my truck qualifies? or take it back to the same shop? any help would be appreciated.

 

If you have 173k, it's expired. It was just to show you that injectors were an issue on the 05's. If you want to keep the truck for the long haul, I'd probably bite the bullet and replace all 8 injectors. If not, a shop should be able to determine which ones specifically are leaking.

New Motorcraft injectors without the issue are $35.79 each plus shipping at rockauto.com.

 

heres what they had to say. It is the Driver Fuel Pump Module.
He siad to start there first. If it still hesitates after that, then its something with the Cats the substrate could be burn away.

 

He actually dropped the spare and removed & inspected it?

If so - why dint he just change it then if that's his diagnosis - it's kinda obvious if you see it.

See: https://www.f150online.com/forums/ar...placement.html

As fer the cat substrate causing yer issues hmmmm.. sounds like BS. It could be one consequence of the root problem.

I repeat - find another shop.

 

• After changing Driver fuel pump module. It cleared a certain error code. Forgot what number the man said, but still continues to give a multiple misfire error.
• Shop said they cut the welds and looked inside the Cats. to make sure nothing was burnt in the substrate. The shop said that looked good.
• Checked plugs they were not wet.
• They said they hooked the code reader while driving it to see what injectors would show the open close error and that came back good.

But they are still quoting me at $750 if it's the injector rails with all eight injectors or like $700 if its just the injectors. He's not sure how it comes from the mfg.

or $1150 for new OEM Cats. Right now I'm at $352 with the Driver Fuel Pump Module change. Thats where I stand. This thread is suggesting it's new injectors but the shop is telling me its showing no evidence of that. Just looking for some direction to resolve this issue. Thanks everyone.

 

Like you were told earlier, find another shop.

 

It sounds like a cam phaser. Cause the injectors are opening and closing fine.

 

Tech inspected and test drove. Error codes present for P1233 Fuel Pump Driver off-line and P0430 Cat efficentcy bank 2 below limit. Recommend replacement of fuel pump driver module. Cat code my be "phantom" Check engine light is cleared.
• Replaced driver module and confirmed cat and driver error codes are gone.
• However, new code present for P0300 random miss. P0301 Cyl#1 miss.
and P016 engine miss at startup. continues to buck when under
heavy accelerating.
• Ford Forums and tech assistance suggest possible faulty throttle-
body assembly. Possible injectors sticking open intermittently and or
fuel rail or cam phaser problems.

Shop recommend replacement of injectors and thorough cleaning of fuel rail.

 

I had an identical problem with my 99 F150 4.6L and it was the catalytic converter.

But Mr. Man, I absolutely HAVE to agree with what every person that replied to you said, GO TO A DIFFERENT SHOP!!! I'm not sure why your so trusting of these guys your going to sir, because its as clear as the sky after a long rain to me that what your dealing with here is mechanics who DON'T know what they're doing and are having you literally pay the entire cost of educating them on this type of problem (when they finally find out what DOES fix your problem, do you think they will offer to not charge or even discount the labor cost for their misdiagnoses?), or who saw in you their next meal ticket come walking through the front door (read: somebody who is trusting we can take terrible advantage of and not loose a minutes sleep to guilt or conscience).

The sad fact is amigo that in my 51 years, most car mechanics/shops are evil, conscienceless hypocrites who take advantage of their customers naivety (lack of knowledge) to profit for themselves. This is why IMHO one of the most valuable things you can have in life is a mechanic you can TRUST. And that usually comes down to simply another person who is unwilling to do to you what they wouldn't what done to them, and works on your vehicle as if it was his own or a close relative. I've only found 3 in my life literally, and as I learned through hard & very costly experience, they are to be treasured and valued as if gold.

So, off my soapbox and on to the help: I would seriously ask you to take the advice given to you here and FIND A NEW MECHANIC. Start asking EVERYBODY you know; your coworkers, neighbors, friends, preacher, mistress, etc. Make a pest of yourself, because your on a quest. Tell them your looking for a mechanic they TRUST, don't just ask what shop/mechanic they know, I've found you'll sometimes get different answers, seriously. ("know a good mechanic Bill?""Yeah, Daves Repair down the street""Is he honest, do you trust him""Oh, I thought you were just looking for a nearby mechanic, hell no I don't trust Dave, I havent found an honest one round here! Why, you know somebody?").

I wish you luck, I really do, I hope you find somebody, but please LEAVE THAT SHOP!!