2018 5.0 Issues
06-30-2018, 04:04 PM
#131
5.0 DOHC V8
Join Date: Apr 2017
Location: The southern California sardine can
Posts: 3,354
Received 1,587 Likes
on
974 Posts
But I have this bad chugging which feels like a misfire.started at about 800 miles and has gotten worse. Now has 6200 miles. New plugs did not help.
I had this issue with my '16 5.0 XLT. Similar symptoms. See Coyote Part Throttle Steady State Stumble.
Eventually there was a DTC P0456 - "Evaporative Emission(s) System Leak Detected (very small leak)", according to my code reader. A tech I am acquainted with suggested the Purge Control Valve; a $47 part that sits, with easy access, on the intake manifold right behind the throttle body. Said he swaps out a bunch of these things but mostly on Mustangs. Same part. Bingo. Truck is running better already.
The following users liked this post:
marcoavqz (02-26-2019)
07-01-2018, 01:31 AM
#132
American member
I had this issue with my '16 5.0 XLT. Similar symptoms. See Coyote Part Throttle Steady State Stumble.
Eventually there was a DTC P0456 - "Evaporative Emission(s) System Leak Detected (very small leak)", according to my code reader. A tech I am acquainted with suggested the Purge Control Valve; a $47 part that sits, with easy access, on the intake manifold right behind the throttle body. Said he swaps out a bunch of these things but mostly on Mustangs. Same part. Bingo. Truck is running better already.
Eventually there was a DTC P0456 - "Evaporative Emission(s) System Leak Detected (very small leak)", according to my code reader. A tech I am acquainted with suggested the Purge Control Valve; a $47 part that sits, with easy access, on the intake manifold right behind the throttle body. Said he swaps out a bunch of these things but mostly on Mustangs. Same part. Bingo. Truck is running better already.
07-02-2018, 09:48 PM
#133
Ford has teething problems cuz everything is so damn new......GMs have all the same old problems, I’ll take the compromise, but it’s odd how they release a truck that is so lumpy at times.
07-03-2018, 08:16 PM
#135
The 10 speed whines and whistles, can't say it is really an issue though.
Last edited by isthatahemi; 07-03-2018 at 11:22 PM.
07-03-2018, 08:27 PM
#136
I'm about to buy a Platinum truck with the 3.5EB. Initially wanted to get a 5.0 thinking it was more reliable (and a V8), even if it is a bit less powerful overall. But turns out the V6 seems to be at least equally reliable, even though it has 2 turbos and engine is more stressed. Oh, and it has better fuel economy too. Was still debating the issue, but this thread made me feel better about my choice. Ha ha. What I didn't like is the freaking fake V8 noise inside the cabin, especially in sport mode. Can it be disabled somehow? Thx.
07-19-2018, 07:30 AM
#137
Senior Member
My 2018 F150 5.0L has built up a heavy, black layer of soot at the rail pipe . The truck has 3000 miles on it. Is this normal? Is it do to the dual port and direct fuel injection? Is it symptomatic of a problem?
07-20-2018, 02:37 PM
#138
5.0L rattle [solved?]
My f150 was producing the same rattling sound after releasing the accelerator. I took it to the dealer, the tech was able to confirm it almost immediately, but at first couldn't find the cause. He referenced their internal system and found a similar situation at another dealership, he spoke with them and confirmed it was related to the VST solenoid. He upgraded the PCM and it cleared up. I have noticed a drastic improvement. There are still a few situations where I can get a rattle, however the frequency, duration, and intensity is considerably less. This leads me to believe it is entirely tied to a software issue and is currently being developed and tested by Ford. I plan to keep an eye on the PCM versions and request an update to the latest release whenever possible. " One step forward, two steps back."
07-20-2018, 02:42 PM
#139
Thanks.
07-20-2018, 08:23 PM
#140
My f150 was producing the same rattling sound after releasing the accelerator. I took it to the dealer, the tech was able to confirm it almost immediately, but at first couldn't find the cause. He referenced their internal system and found a similar situation at another dealership, he spoke with them and confirmed it was related to the VST solenoid. He upgraded the PCM and it cleared up. I have noticed a drastic improvement. There are still a few situations where I can get a rattle, however the frequency, duration, and intensity is considerably less. This leads me to believe it is entirely tied to a software issue and is currently being developed and tested by Ford. I plan to keep an eye on the PCM versions and request an update to the latest release whenever possible. " One step forward, two steps back."