My 05 F150

37chief · Jan 6, 2019

My F 150 V 6 ran good when I parked it yesterday. This morning it ran terrible like a cylinder wasn't firing. I got a mile down the road, and turned back is almost stopped running. I got home, going real slow, because that's all it would do. I could hear a couple back firing also on the way home. Where in your opinion where do I start trouble shooting? Need someone smarter than my self on this problem. Stan

37chief · Jan 6, 2019

Update on my problem. I started it this afternoon. Seven hours later. It runs smooth, but doesn't take full throttle. Stan

Janicholson · Jan 6, 2019

Fuel delivery. Fuel filter, Fuel pump, Fuel Pressure regulator. Jim

Vicinalvictor · Jan 6, 2019

More than likely, coil pack(s) are bad. Google it.

Janicholson · Jan 6, 2019

If filter, the sitting can let enough settle to allow better but not good operation Jim

Gambles · Jan 6, 2019

Did the "check engine" light come on?
Vehicles '96 and later are OBDII and should produce a code. Cheap code readers are available about everywhere and should be able to read a code that (I assume) your truck gave.
That would be a first start to finding the problem.

rustred · Jan 6, 2019

least it was not( Found On Road Dead.} vehicles need a computer to run and a computer to tell whats wrong.

rustyfarmall · Jan 6, 2019

Maybe some squirrels paid a visit overnight and chewed up some wiring?

Rex Simpkins · Jan 6, 2019

I had a similar problem with my V6 Ranger, If I remember right it was a cam position sensor or something like that on the rear of the engine. I pull it out like you would remove a distributor. I think I am right it's been a while but the oil pump drove whatever it was I replace and the problem was cured

Elton Fancher · Jan 6, 2019

I have no idea, but I have seen some of the Ford trucks have some kind of issue with breaking spark plugs. I am sure someone on here will know more bout that than me.

Geo-TH,In · Jan 6, 2019

Stan,
50 years mechanics were parts hangers. If this part doesn't work, hang another one.

Today, more complicated and very expensive parts. First thing I would do is stop off at Auto Zone and have them scan the ICM for Free. Then it's a guessing game, start hanging parts.

I had truck serviced and then check engine light came on soon after. I had ecm scanned and possible O2 sensor code came up. I bought all 3 sensors and started to replace them when I discovered a vacuum hose came off. Possible when the guy worked on replacing distributor and rotor.

If I can't repair it, I know a good old country boy 2 miles south that can and is very reasonable. Sometimes hiring someone may be cheaper than hanging parts you don't need.

Harper · Jan 6, 2019

Had what sounds like a similar issue several years ago with a 89 Ford Ranger. Had water in the fuel filter under the frame rails. Temperatures dropped into the teens and it froze. Ran rough then as drove it got rougher than until it would starve for fuel. Replaced the filter and all was good. Laying on the ground under a truckload change the filter in 13 degree weather was not fun.

jacksun65 · Jan 6, 2019

It's probably operating in limp mode. need to get it checked. could also be water in the fuel.

grizz02 · Jan 6, 2019

tell us how cold it got last night like has been said might have water in fuel then iced up now that it warmed up ice is melting back to water, still bad

David G · Jan 6, 2019

More than likely a coil pack, hook up a scanner.

robgIN · Jan 6, 2019

another thing to check is the pcv hose, the rubber elbow may have collapsed and created a big vacuum leak. Does sound like may be coil issue, but a few minutes on a scan tool would tell a lot. Those engines also have a port that runs down the center of the intake with an orifice in each intake port for the EGR, often the orifices will plug with carbon leaving only 1 or 2 still open and all the egr flow gets dumped in one cylinder causing a misfire at cruise or light access, but not idle as no flow then.

VicS · Jan 6, 2019

In our part of the world (southern Illinois) Ethanol is in all gas, so no water problems.

OregonAaron · Jan 6, 2019

A few years ago I bought a bluetooth code reader off Amazon for about $15, next I bought the torque app on my phone for $5. Works great, in fact you get live information that the computer is reading. Money well spent. So, My point is, code readers are cheap and could probably be a big help to you and your truck!

Hobo,NC · Jan 6, 2019

No guess BUT if you do plugs, wires are coil take a pitcher of the plug wires on the right bank and put them back like oem routed them...

jimg.allentown · Jan 6, 2019

Well, because I am a bit over 3000 miles away, it will be a bit difficult for me to diagnose, but one thing I can tell you is that hanging parts will be the MOST expensive way to fix it.

By all means, start with the basics. Check for the obvious things. Warning lights (check engine) are a good starting point. If the light is on, there is a code. Maybe a hard fault. That is the first thing to deal with.

Open the hood. Look for simple things like loose wires, loose hose clamps - especially in the air intake ducting.

If you feel capable of doing some repair work on your own, I strongly suggest that you invest in a scan tool. Many of decent quality and good capability can be had for less than $200. Use it 3 times, and it will have paid for itself in money saved on shop diagnostics.

The sad and unfortunate truth is that there are 101 things that can cause your problem. There are no short answers. Especially not from thousands of miles away. Anybody that gives you a short answer basically has NO IDEA what they are talking about. Ignore them.

OregonAaron · Jan 6, 2019

The above post is the truth! If someone gives you a quick answer, use caution! Definitely get a scanner on it before anything else. If there are any chain auto parts stores nearby usually they have a scanner you can use in the parking lot. Since I have a ford- i will testify to the coil packs causing and issue like you describe.... However- test- dont guess!

Bruce(OR) · Jan 7, 2019

I just retired from playing mechanic for a few years. A scan tool would be the first order of business.
Now a problem arises in how badly it is running.
If your misfire is severe enough, you will be filling the converter with too much un-burnt fuel which can cause converter failure fairly quickly. So the question now becomes one of drive it to the parts store for a diag and possibly buying a coil pack or two or whatever and then installing prior to taking it home to keep the converter happy.
OR
Take it down to the dealer and let them swap parts trying to fix it. Yes, Dealer mechs have historically installed parts from the pats room only to return them when they don't fix the problem.
The scan is the first order of business.
Now if you don't like the dealer. . . A lot of people don't. . . Talk to other people in the area as to who they take their vehicles to, Especially other Ford Owners. Contact the BBB and inquire about complaints lodged. You can also do an online search for complaints, just be able to look past the people who say, "Last week they replaced the radiator and then the muffler fell off" One has nothing to do with the other.
Good Luck.

My 05 F150

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