Problem with new to us 2015

[MO311FAN]

Officially picked up our Expedition last night. We had it checked over by our mechanic and no problems were detected, had regular maintenance, seemed like a good vehicle.

This morning my wife left for Kansas City with her mother, sister and daughters to go see Carrie Underwood in concert tonight. Along the way the Expy would sputter some when she tried to pass a couple of times, and a check engine light came on for a minute or so as they got into KC (about a two hour trip). She was a little worked up when she called. She flipped through the gauges nothing abnormal, the transmission oil temp was at 194.

Anybody got any advice before she hits the road for the trip back tomorrow?

Thanks,
Josh

 

[MO311FAN]

New spark plugs 20k miles ago. Nothing weird showing up on Carfax.

 

[mquick5]

Gonna need to run a code scanner.

Sent from my SM-G930T using Tapatalk

 

[bobmbx]

Sounds like a misfire. Could be a bad COP. What you've described doesn't sound serious, just irritating.

 

[Adieu]

Go to Amazon or Ebay, search for "Panlong OBD2", and buy one per vehicle you own.

Leave them plugged in and download the app "Torque Lite" (free) on Android phones or tablets or headunits.

No more guessing what the heck is wrong if a CEL flashes at you. Whip out phone and check.

$11 for peace of mind


PS if iPhone/iPad, ask someone else what you need

 

[sixsix]

I carpool with a guy to work who has a '14 F150 with the 3.5 eco, his truck did the same thing to us and I witnessed it first hand. Code was cylinder #5 misfire. Brought it to the dealer and they changed all the plugs, that one coil pack, and both his O2 sensors. Truck runs smooth now and he got a couple of MPG's back.

 

[Adieu]

New spark plugs 20k miles ago. Nothing weird showing up on Carfax.

I carpool with a guy to work who has a '14 F150 with the 3.5 eco, his truck did the same thing to us and I witnessed it first hand. Code was cylinder #5 misfire. Brought it to the dealer and they changed all the plugs, that one coil pack, and both his O2 sensors. Truck runs smooth now and he got a couple of MPG's back.

In light of the new-ish plugs, scan for codes, locate which cylinder, see if the plug is loose first then remove and inspect it for damage or gap issues anyway.

Torque down correctly, clear codes, drive around see if it comes back.

If it does, swap coils with the next cylinder, clear codes, see if it moves or stays (misfire codes end in the cylinder number the problem is on)

If it moves: change that coil.

If it stays: swap injectors with the next cylinder over, clear codes, see if moves cylinders or stays

Injector-moves: change that injector

Stays: ....well, ****. Time for new advice or maybe a professional opinion on the matter.


PS if you see coolant in the plug well, change that plug & coil, and find and change the leaky hose that caused the issue

 

[99WhiteC5Coupe]

Officially picked up our Expedition last night. We had it checked over by our mechanic and no problems were detected, had regular maintenance, seemed like a good vehicle.

This morning my wife left for Kansas City with her mother, sister and daughters to go see Carrie Underwood in concert tonight. Along the way the Expy would sputter some when she tried to pass a couple of times, and a check engine light came on for a minute or so as they got into KC (about a two hour trip). She was a little worked up when she called. She flipped through the gauges nothing abnormal, the transmission oil temp was at 194.

Anybody got any advice before she hits the road for the trip back tomorrow?

Thanks,
Josh

Have the vehicle scanned for any trouble codes. Everything else is just guessing.

 

[MO311FAN]

Thank you all! Will start diagnosing when she gets back.

 

[99WhiteC5Coupe]

Thank you all! Will start diagnosing when she gets back.

Good luck - let us know what you determine.

(I have a 2015 Expedition Limited 4x4, purchased new.)

 

[MO311FAN]

So one of my neighbors owns a Midas in town, he ran a scan and it showed a misfire on cylinder 1. I called the dealership we bought the Expy from and told them what was going on, they told me to bring it in. After about 45-1hr, they came and told me it was fixed, “it was a spark plug.” Couldn’t really ask exactly what the problem was because I was dealing with our sales lady.

Drove to a Cajun restaurant 30mi away for my birthday dinner tonight. Have run her at many different speeds, acceleration levels, no problems.

Keeping my fingers crossed that was our stroke of bad luck.

Kudos to Bob McCosh dealership for taking a “as is” vehicle in and offering to fix whatever it may have been.

 

[99WhiteC5Coupe]

So one of my neighbors owns a Midas in town, he ran a scan and it showed a misfire on cylinder 1. I called the dealership we bought the Expy from and told them what was going on, they told me to bring it in. After about 45-1hr, they came and told me it was fixed, “it was a spark plug.” Couldn’t really ask exactly what the problem was because I was dealing with our sales lady.

Drove to a Cajun restaurant 30mi away for my birthday dinner tonight. Have run her at many different speeds, acceleration levels, no problems.

Keeping my fingers crossed that was our stroke of bad luck.

Kudos to Bob McCosh dealership for taking a “as is” vehicle in and offering to fix whatever it may have been.

I changed the original spark plugs on my 2015 Expedition Limited at about 45,*** miles. I use top tier fuel, do not tow (although I have the HD tow package), and most of my driving is on rural state routes. I used the OEM Motorcraft plugs.

The original spark plugs were very black, with the gap opened up. They looked like they had 150,000 miles on them.

I will probably change the spark plugs again at 75,*** miles - it was somewhat easy, and I fear the Ecoboost engine eats spark plugs. I can’t believe Ford recommends a change interval of 100,000 miles - which could also include towing.

 

[MO311FAN]

so I just got back from KC (it was a trip for all the guys). No problems at all, she drives like a dream. Really happy to have this rig!

And when I got home we found that she fits in the garage!

 

[John D]

I had a cylinder 6 misfire with exact same symptoms as you and about 30k on motorcraft plugs. I did all 6 plugs, but #6 had a crack in the porcelain.