2002 Ford F-150: misfire or rough idle

Filed Jun 17, 2022 · Engine · GA

1. Coils on top of spark plug get moisture in them when there is just the right kind of rain storm. This makes the coil or coils fail until the dry out. This seems to make the coil eventually go bad. Yes, it is available for inspection. 2. Not sure if its a combination of heat and moisture but sometime right away and sometimes a few minutes into driving the coil or coils fail and the engine loses power. Then if seems to be a random, unpredictable occurrence until it dries out, Very Unsafe. If one coil fails it loses just a little power, but if more than one fails it loses a lot of power and stalls at times. This is why I am writing it up. A few time now, I have gone to pull into traffic and then I lose power and either have to run off the road or just upset the car behind me if they are not too close. 3 & 4. I have advise all the Ford dealerships in my area trying to find one that has a fix yet. The only fix Ford has, is a new designed coil, which does not appear to be any better. The dealership just replaces the coil. I have had all my coils replaced, some 2 or 3 times. 5. It depends, sometime the engine light will come on and advise which coil is misfiring and sometimes if does not. Right now my engine light is on and it displays the #6 coil misfire. Then the engine light will go out after it dries out and stops failing or it will stay off if the coil had gone bad again. I am sure its not just the F 150, but the 4.6 liter engine that is in other vehicles. I started keeping track in 2012. I wrote a letter to Ford in 2015 and they replied, there was no recall. I have several repair receipts and the letter from Ford if you need that. Just search on your site and you will see many complaints. One example Manufacturer Communication number: 041601. If you google "ford fix for moisture in coils" you will see many forums trying to figure out a fix and just complaining.

Filed Dec 4, 2012 · Engine · 138,000 miles · NY

While driving 60 MPH I heard a loud pop followed by deceleration and engine misfire. Examined engine compartment and observed compression air from #4 spark plug. Overhead coil broke off and still attached to #4 spark plug. Gas fumes and still sparking plug was a disaster waiting to happen so I had the truck towed 150.00. And 300.00 repair to rethread cylinder head. Mechanic said it was original sparkplugs and examined all remaining plugs. # 1 plug seating was damaged upon inspection and appeared that it was about to pop out also.

Filed Aug 6, 2011 · Electrical · 102,002 miles · FL

Coil pack causing engine to misfire.

Filed Dec 28, 2009 · Engine · 94,227 miles · CA

Tl* the contact owns a 2002 ford f-150. The number 7 and 8 spark plugs have blown out of the cylinder head. The vehicle was taken to the dealer for inspection. The technician stated that the spark plugs misfired because there was not enough thread to hold the spark plugs in place. Spark plug number 8 and replaced and number 7 was in the process of being replaced. The failure mileage was 94,227.

Filed Dec 30, 2008 · Engine · 58,000 miles · CT

2002 ford f150 5.4 liter engine. Traveling at approx 25 MPH I heard a loud pop from the engine compartment and something hitting the hood. The car started to run rough and gasoline fumes started to fill the passenger compartment. I took the truck to a repair garage who indicated that a spark plug had blown from the head. I was told this is a common ford problem by the garage and subsequent research on the internet has verified this. The head was remilled and the plug and coil had to be replaced. Ford does acknowledge an issue and has issued a tsb however warranties do not cover repair. With the plug blown out of the head gas vapors were being injected into the engine compartment and the risk of fire is present.

Filed Jan 2, 2008 · Engine · 45,900 miles · NJ

I was returning from work on 1/2/08 when my 2002 ford f-150 (triton 5.4l) began to pop and run rough, I smelled gasoline in the cab of the truck and pulled right over, upon looking at the engine I noticed the #3 plug lying on top of the engine, it had blown out. This plug was factory installed and had never been removed from the engine.

Filed Jan 22, 2006 · Electrical · 44,000 miles · MD

Manufacturer uses faulty electronic component in vehicle ignition system. No part of system provides for indication of potential failure or complete failure. Once part fails, the vehicle experiences random misfiring in cyclinder which causes damage to spark plug threads of aluminum cylinder head. Eventually spark plug is blown from cyclinder head resulting in loss of power and function. Resulting damage to aluminum cylinder head requires replacement at cost of @ $3,000. Replacement parts are identical to failed parts and potential repeat failures continue. No corrective action to parts has been reported and no improvements to vehicle sensing system have been made. Ford motor company disclaims any responsibility for damages except those covered under initial vehicle warranty or those covered under extended warranty. If warranty does not cover failure of electrical components then ford motor company will not cover collateral damages ( failure of cylinder head spark plug threads). Ford motor company published internal technical service bulletin to repair facilities that requires use of oscilliscope to determine if electrical part is experiencing problem. Ford repair facility refused to return damaged cylinder head and faulty coil-on-plug assembly stating that they were required core returns.

Filed Jul 21, 2005 · Engine · 49,000 miles · GA

Replaced spark plugs, drove normally for 8 or 9,000 miles, went to ohio and back .then drove to work on the 19th, heard a pop and the truck started to run rough. When I got of work I looked at the truck and found the number three plug was ejected out of the cylinder head.

Filed Oct 4, 2004 · Transmission · 20,000 miles · PA

Rough idle.

Filed May 10, 2004 · Electrical · 3,000 miles · WA

Ignition coil misfiring, vehicle exhibited occasional miss fire. Upon cold start after sitting for several days plume of blue smoke from tail pipe was noticed. Dealer could not duplicate event but determined #1 ignition coil was firing at reduced capacity. Unit was replaced and incident of blue smoke at cold start has been reduced.

Filed Feb 28, 2003 · Engine · 341 miles · ME

Engine misfires in cold weather while driving causing serious loss of power first started at 341 miles and continues to date.