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OB Mechanics: 2013 F-150 Ecoboost Misfire
Posted on 4/20/18 at 11:34 am
Posted on 4/20/18 at 11:34 am
I have a 2013 F-150 Ecoboost with 136,000 miles. I have been having issues with my check engine light blinking when accelerating and the truck shuttering until the light goes away. I was reading that this is a sign of a misfire. I attached my OBD-2 reader and it gave me the code P0300 for random misfire. I've done some research and it looks like a lot of people say replacing the spark plugs will help and some say to replace the ignition coils as well when replacing the spark plugs.
Are replacing the ignition coils necessary when replacing the spark plugs? Or should I just replace the spark plugs first and see if that fixes the problem?
Are replacing the ignition coils necessary when replacing the spark plugs? Or should I just replace the spark plugs first and see if that fixes the problem?
8
Posted on 4/20/18 at 11:39 am to zx24
just try the spark plugs 1st.
If it doesn't fix it then try the coils
If it doesn't fix it then try the coils
Posted on 4/20/18 at 11:39 am to zx24
I had this issue with an older F150. It was random, I changed coil packs and plugs. It would run fine, then all the sudden one or two more would fail. Finally my wife convinced me to get rid of the truck because this was obviously a result of a larger problem that no one could pinpoint. I have buddies who have only changed the plug and coil pack and they had no other problems.
Posted on 4/20/18 at 11:41 am to zx24
I had a 2012 ecoboost with the same problem. Changed the spark plugs and the problem went away. The old spark plugs had small cracks in the porcelain on several of them. It was a cheaper fix and the coils looked to be in good shape.
Posted on 4/20/18 at 11:43 am to zx24
You can bring it to a shop and see what cylinders are misfiring more than spec. Id suggest you start there. Replace those packs. Replace plugs just for the extra insurance.
Or you can just do all plugs and packs (not sure if the 3.5 has wires) at the same time. That'll be expensive though.
P0300 is annoying as shite.
Or you can just do all plugs and packs (not sure if the 3.5 has wires) at the same time. That'll be expensive though.
P0300 is annoying as shite.
quote:My buddy had this on his 5.0
The old spark plugs had small cracks in the porcelain on several of them
This post was edited on 4/20/18 at 11:45 am
Posted on 4/20/18 at 11:46 am to zx24
Replace the spark plugs and coil pack boots. Coil packs are spendy if your firing the parts cannon. Motorcraft coil pack boots are about $4 each vs $50 for a coil pack. Apply dielectric grease to the base of the boot before installing.
This post was edited on 4/20/18 at 11:48 am
Posted on 4/20/18 at 12:04 pm to zx24
quote:
I have a 2013 F-150 Ecoboost with 136,000 miles.
quote:
code P0300 for random misfire. I've done some research and it looks like a lot of people say replacing the spark plugs
Did you look at your maintenance schedule?
Posted on 4/20/18 at 12:08 pm to cajuncarguy
The manual says to change plugs every 100k.
Posted on 4/20/18 at 12:55 pm to bbvdd
quote:
just try the spark plugs 1st.
If it doesn't fix it then try the coils
Do this. My 2011 ecoboost was misfiring a bunch and running rough. Changed the plugs and it ran perfect. I had to do that around 60K miles.
Posted on 4/20/18 at 1:08 pm to zx24
Happened to my 13. Changed the spark plugs and it never happened again
Around 100k I believe
Around 100k I believe
This post was edited on 4/20/18 at 1:09 pm
Posted on 4/20/18 at 1:09 pm to Buster180
Well that makes this easier
Read thy owners manual. Follow thy owners manual. It was written by smart people.
Read thy owners manual. Follow thy owners manual. It was written by smart people.
Posted on 4/20/18 at 1:37 pm to DownshiftAndFloorIt
Plugs are over due bad. I'm sure that will solve your problem unless those coil packs have degraded from plug fouling. You'll soon know. And on a Ford if a coil pack fails it will display on the meter at orilleys or napa when they plug it in which cylinder number failed. easy fix, like 5 minutes. And they are the cheapest on EBAY
Posted on 4/20/18 at 1:54 pm to Boat Motor Bandit
quote:
And on a Ford if a coil pack fails it will display on the meter at orilleys or napa when they plug it in which cylinder number failed
Will their readers provide any more information than my ODB-II reader? From what I can tell the code will read P0301 for cylinder 1, P0302 for cylinder 2, etc... P0300 is a general misfire and not specific to one cylinder.
Posted on 4/20/18 at 2:08 pm to zx24
Yea their meters give me way more info than your basic code readers. And its free and takes like 5 minutes/
Posted on 4/20/18 at 2:25 pm to Boat Motor Bandit
The code readers at auto parts stores are just your basic $20 ones. A shop will be able to log misfires for each cylinder over time, and compare that to what is allowed by spec from Ford. Those code readers are $1000+
quote:From my experience, unless you have a hard, consistent miss on a cylinder, you'll typically get a P0300
zx24
This post was edited on 4/20/18 at 3:52 pm
Posted on 4/20/18 at 4:51 pm to zx24
Mine had this and I put new plugs and coils on it and nothing changed. I did some research and learned the intercooler will accumulate water and/or oil in it and this causes the misfire when sucked in the intake under higher boost conditions.
The cure (for me) was to drill a 1/16th hole in the lowest point I could find on the intercooler, run it for a couple of days with an open hole, and then I put a screw in for a plug. The link below explains it far better than I can
LINK
The cure (for me) was to drill a 1/16th hole in the lowest point I could find on the intercooler, run it for a couple of days with an open hole, and then I put a screw in for a plug. The link below explains it far better than I can
LINK
Posted on 4/20/18 at 5:33 pm to Barneyrb
lulz at the Ecoboost
Posted on 4/20/18 at 11:06 pm to Hammertime
This. The reason AZ, Oreilly, etc. have OBD scanners is to diagnose a reason to sell you a part, then a part, then a part.
P0300. The number 1 code in OBD. Plug, coil, throttle body, TPS( box stores number 1 reason the sun doesn't rise), lifter, cam, lobe, jug, piston, alternator, ground, ECM, injector, all filters, actuators, turbo, waste gate, etc.
If you can change plugs yourself then do it and have them clear the code. Comes back please take it to a local mechanic who gives a flip about fixing something and keeping a customer happy.
P0300. The number 1 code in OBD. Plug, coil, throttle body, TPS( box stores number 1 reason the sun doesn't rise), lifter, cam, lobe, jug, piston, alternator, ground, ECM, injector, all filters, actuators, turbo, waste gate, etc.
If you can change plugs yourself then do it and have them clear the code. Comes back please take it to a local mechanic who gives a flip about fixing something and keeping a customer happy.
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