HELP ME!!

[Cmac2020]

Sounds like bad Coils to me. I did a plug change and installed new coils (link below) and it runs great again -

https://www.amazon.com/gp/product/B00EOXZLG2/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

 

[Steve Langford]

If you or mechanic suspect an intake leak, have the intake system fogged. Wherever the leak is, the smoke will come out of. These vehicles have a myriad of hoses. Trying to do it old school way is possible, but takes a long time. Let us know what you find.

Sent from my N9131 using Tapatalk

That's just what I did...Same symptoms on my 99 5.4...
Made up a smoke detector thing with a coffee can hoses a cigar, and cheap cigarette lighter tire pump...
Found my vacuum leak...
Bell connector just under the IAC which runs to the passenger side PCV...
Tool a piece of 3/8" hose, a 1/2" hose and a 5/8" hose and shoved then into each other...
Works but is temporary...
Picture is of the part I need...

 

[Habbibie]

This person is obviously not responding. Stop wasting your time and energy guys

 

[The Laddy]

Thanks for the ideas all. I made sure the fuel filter was correct when I installed it. I just replaced all 4 oxygen sensors, still is hesitant. I replaced all of the vacuum lines when I did the EGR stuff. Next step it looks like are the coil packs. I'll let y'all know what happens . ..

 

[The Laddy]

Sorry for not getting back to you sooner, my alerts weren't working.

 

[Misfit]

check the intake for leaks, and the pcv hose.

 

[The Laddy]

I just did the intake gaskets and made sure they didn't have any leaks. Which pcv hose? To the valve cover?

 

[The Laddy]

Thanks all for the ideas, but it was the coil packs that we're bad. My truck works awesome now.