Question about 2005 Ford F-150

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05 f-150 5.4L 3v missfire on take off (light throttle)

No codes Coil or Injector??

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  • auto dr Jul 04, 2008

    have snap-on w/can

  • auto dr Aug 15, 2008

    Truck has aprox. 10k on fact replaced crate motor 89k total. on take off w/2" depression of gas petal their is a rapid pulse vibration . Feels like a coil missfire (cop) 300HP 3valve 4x4 auto.17" alum.wheels (stock) no mods. all fluids replaced w/synthetic 1 bottle of motor craft LSD additive in ea. diff. I have snapon 2500 scaner w/can adapter also vantage pro. no missfire codes have ever come up as well as no freeze frame data. Ford dealer installed eng. was returned 700mi no power. ford replaced Fuel pump & Filter. then found prob. w/head. since plenty of power avg.aprox. 17mpg can feel eng. skip ocasionaly at idle too.

  • nukem107 Oct 26, 2008

    i have the same truck it has 78k on original motor but it keeps missfiring i had the # injector replaced and all the spark plugs replaced and it still does it the ford dealer doesnt know whats going on with it. can someone help me.

  • tsd98 Nov 03, 2008

    My 2005 F-150 5.4 has the same misfire above 3000 rpm. Have replaced fuel pump, all injectors, some coils and a couple plugs to no avail. Need help desperately. Dealer can't find problem.

  • steve452 Jan 21, 2009

    Having the same problem. I took it into the shop, and of course on the way the check engine light went off and everything was fine. Next day on the way to the office it starts again. Seems to go away when I press the gas, or when let go of the gas and cruise. Today was the first time that it occured over 40mph, as before it only happened below 40.
    The dealership has no idea and as they cleared the codes and test drove it and nothing happened.

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I took mine to the dealer. They replaced some plugs and updated the software for the truck. It has been running just fine since then. Give that a shot, it is a lot less expensive then having everything else done and then finding this solution out.

Posted on Feb 03, 2009

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Could u please be more specific about the problem??

Posted on Aug 02, 2008

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I would strongly suggest checking the Carbon cannister for water getting in through the breather tube. I have had ( and do have ) the same problem and it was diagnosed water getting into the tank. If the vent gets placed in a bad area of the truck, which most of them are right up near the spare tire. then they will collect water in the tank.

Posted on Feb 03, 2009

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2 Answers

What could this be?


CODE 301 IS #1 MISSFIRE 300 IS RANDOM MISS FIRE 201 IS INJECTOR FAULT . I WOULD START BY SWAPPING # 1 INJECTOR WITH SAY # 3 AND SEE IF THE MISSFIRE MOVES TO #3 IF SO REPLACE INJECTOR, IF NOT THERE COULD BE WIREING ISSUES

Oct 16, 2013 | 2006 Jeep Liberty

1 Answer

I have a code Po301


P0301 is a missfire code for cylinder one.
Could be a spark plug, coil, or injector problem.

Jul 03, 2012 | Cars & Trucks

1 Answer

04 Dodge Ram V8 - #3 Miss fire - more than once! Had a tune-up, replace #3 plug & coil, swaped out coil & plug. Engine light still came on after running for a while. Checked radiator for oil,...


Hello crey60
Try checking the fuel injector on the #3 clyinder for dirt or damage. A faulty injector will cause a missfire code and trip the check engine light. Hope this is helpful.

Mar 12, 2011 | 2004 Dodge Ram 1500

1 Answer

I changed the plugs, fuel filter, coil pack, and injector...now what?? its still missing and reading cylinder 5 missfire!!!


You either have another bad COP Coil and possibly
#5 wasn't bad either,or other issues

Check for vacuum leaks

If the O2 Sensors have 100,000 miles
change the front 2 only, with OEM,not a
cut and splice thing. NAPA can order them

Disconnect the vacuum hoses to the EGR Valve,
plug and drive a couple of days,to see if it is the issue.

Clean the MAF with CRC MAF Cleaner
Clean Throttle Plate with CRC Throttle Body Cleaner

Check fuel pressure at fitting on fuel rail with a gauge

What codes do you have?
Who is doing the work on your veh?

Jan 30, 2011 | 2001 Ford Expedition

1 Answer

What does the code "misfire on bank 1 mean" on a diagnostic code for a 2000 lincoln navigator mean?


Do you mean "missfire on cylinder 1", code P0301? If so, that means that the computer has detected incomplete combustion in the #1 cylinder, which would be the front passenger side cylinder. There are many potential causes to a cylinder missfire ranging from worn / bad ignition components, clogged / bad fuel injector or even internal engine damage.

However the most common cause, especially on ford vehicles is a bad ignition coil. When trying to determine the cause of a missfire on an engine such as the one in your Navigator i start with removing the plug and checking for carbon tracing, excessive plug gap or contaminants on the plug. If that checks out ok i then swap the ignition coil from the missfiring cylinder to one that isn't. For example, I would swap the ignition coil from #1 to #2 and clear the codes. Then drive around until the light comes back. If it comes back with a missfire on cylinder #2 then you know the cause is the ignition coil and it has to be replaced. If it doesn't then it is something else causing the missfire which will require a bit more diagnostics.

How many miles are on your Navigator? Have the plugs ever been replaced? If you have close to 100k it would be a good idea to replace all of the plugs. Be careful when removing the plugs, it's not difficult to pull the threads right out of the head when removing the plug.

Jun 05, 2010 | 2000 Lincoln Navigator

2 Answers

Blinking engine light,cylinder 6 misfiring,sputtering , changed w


i would deffently try the carburator cleaner trick then odds are its a vacum problem. also just asking before having replaced the fuel injector on that cyl. did you or the shop use a noide light to make sure it had injector pluse on that fuel injector wiring plug.

Mar 11, 2010 | 1998 Ford Windstar

2 Answers

Missfire on number 3 coil on 2001 S type Jaguar 3.0 V6 Sport


Check the igniter module.
I assume you have a ecu code telling you #3 coil is missfiring ?
If so also check the crankshaft angle sensor .
If it is not an error code do a compression test and check the injector.
Hope this helps
Regards
George

Jul 08, 2009 | 2001 Jaguar S-Type

2 Answers

Cylinder 8 missfire


If the plug and coil are good and you have good compression you should probably replace the cylinder 8 fuel injector.

Mar 12, 2009 | 1997 Ford F150 Regular Cab

1 Answer

Po302 code,po301,po300


usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens

Dec 27, 2008 | 1999 Toyota 4Runner

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