The contact owns a 1999 Ford F-150. The contact stated that the exhaust manifold started breaking away from the vehicle. The contact took the vehicle to a mechanic and was informed that the bolts holding the manifold in place had rusted and broken off. The contact was also informed that this was a common failure. The failure mileage and current mileages were 291,000.

- Quincy, IN, USA

Started the truck up an blast off! dont know where the plug went but it was gone after I heard a loud bang.

- South Roxana, IL, USA

I've had two plugs blow out on my 99 F150. It has less than 100,000 on it. If they know its a defect why not step up and fix the problem? it cost $300 a plug!!!! left me stranded at night with my family along the road!! makes me wonder if I want to stay with Ford or go elsewhere.

- Washington, IA, USA

Cylinder 5 spark plug blew out while driving, wrecking the threading in the spark plug hole and the coil.

- Stetsonville, WI, USA

In may was at a stop light when the light turned green I accelerated and the plug blew at seconds later I got it towed to the shop fixed it with the heli-coil kit days later as I was going up a steep hill heard a popping sound brought it right to the shop another plug was ready to eject they pulled all plugs anti seized them good for a couple months now in Sept it is ready to lose another plug. My truck is a 1999 Ford F-150 Triton.

- Mantua, NJ, USA

I purchased my 1999 Ford F-150 4X 4 with a Triton 5.4 V-8 engine used. The engine had approximately 140,000 when I purchased it. I only drive it to and from work in las vegas, nv (approximately 25 miles round trip) at speeds below 50 mph. The engine blew the back plug at 163,000. Because it was the back plug the labor to repair was high (pull the engine). The difference in putting helicoils (all eight plugs) in and a new engine was not that much difference so I order a long block full engine from Ford with stipulations it corrected the design flaw. The engine cost almost $7000 when all was done and complete. Ford warranty the engine 3 years and 75,000 miles. I figured this corrected the issues with the spark plugs blowing out. Well at the 4 year point and approximate 25,000 miles the new engine blew a plug. Ford and the dealer (whom we purchased the engine from) say it is our problem. The dealer (parts manager) actually said since I was not a frequent customer and had purchased the truck used they did not see a way to help. I have researched this issue on the internet and believe it is design flaw in the head. I am in the process of having steel inserts put in all of the spark plug holes so I might get use out of a hefty investment in a motor with a known issue which Ford will not back. I own a Ford crown victory, a Mercury marquis ls, and the F-150 truck... these are the last vehicles I will own from Ford.

- Las Vegas, NV, USA

Have had a spark plug ejected twice now within 3000 miles. After some research this seems to be a common problem with some Ford engines. It was actually pretty scary due to the strong odor of gas afterwards with the engine being so hot. It now seems like its going to be a costly problem to fix. Even worse, the fix is no guarantee that it won't happen to the replacement cylinder heads.

- Haughton, LA, USA

I own a 1999 Ford F-150, 5.4L V-8 Triton. I recently had a tune up in December 2010 with all eight spark plugs and wires changed out for a mere $700. In Feb 2011, as I was taking my children to school, I heard a loud pop then my engine started to sound like a tractor without a muffler on it. I pulled over and called wrecker to return the truck to my house, out of pocket $60, not knowing anything about engines. I called the repair center who then had it transferred back to their shop for repair. The #8 plug had completely shot out ripping the coil with it. They fixed that, now two weeks later, the #7 plug is fouled according to the mechanic. This is a major safety concern and a financial burden, as I read other statements of the same defective issues with Ford, considering fire could have been a result. Please re-open this investigation and force Ford to issue recall so that those of us who are financially strapped can have our trucks repaired. Otherwise I can assure that I will never buy Ford product again.

- Cherryville, NC, USA

1999 Ford Triton 5,4L. #2 sparkplug thread failure. The sparkplug was blown out of head and ignited a small fire under the hood.

- Linden, TN, USA

Ford F-150 5.4L Triton engine - blown out spark plug...plug ejected from the engine while - smoke, minor fire...

- Anchorage, AK, USA

The contact owns a 1999 Ford F-150. The contact stated that since 2007, four spark plugs worked their way out of the head and blew out the cylinder. Each time, he would install a new plug and ignition coil. The vehicle had not been inspected or repaired by an authorized dealership. The contact had not spoken with the manufacturer at the time of the complaint. The current mileage was approximately 145,000. The failure mileage was approximately 110,000

- Cincinnati, OH, USA

The contact owned a 1999 Ford F150. The contact stated that after driving 1/4 mile and then parking the vehicle near the garage the truck caught fire while it was turned off. The fire department was called and extinguished the fire. There were no injuries. The vehicle was destroyed. Ford has not been contacted. The failure mileage was approximately 120,000. Updated 09/16-10 updated 09/20/10 the consumer stated the fire started under the hood. Prior to the fire, the battery light illuminated. Updated 09/20/10. Updated 08/01/11 the consumer stated the fire started under the hood. The fire dept. Did not know what caused the fire. Six days before the fire, the battery light illuminated. The consumers husband had the vehicle inspected and everything checked out fine. Updated 08/02/11

- Ekron , KY, USA

I noticed a ticking noise which sounded like an exhaust manifold leak for the past few days and just today I was taking off from a stop sign when the spark plug blew out of the head creating a loud knocking/ticking noise. I have not had it fixed yet, but from what I understand this can create engine fires which can be a major safety hazard.

- White Bear Lake, MN, USA

The contact owns a 1999 Ford F150. The contact stated that in July 2009 while driving, the coil pack became dislocated along with a small piece of the spark plug. The contact stated that the threading on the spark plugs was not sufficient enough to hold it in place, causing the plugs to fail due to engine movement. The fuel line was located above the spark plugs and the contact was concerned that if the spark plugs failed, a fire could result. The vehicle was taken to an authorized dealer where the coil pack was replaced. The failure occurred again in July 2010. The vehicle was repaired again by the dealer. The manufacturer offered no assistance. The current mileage was approximately 137,000. The failure mileage was 123,179.

- Littleton, CO, USA

I had just got off work and was leaving the parking area and blew out the number 4 sparkplug on the right side head. I shut off the my truck and parked it. I called a friend that lives close for a ride home. The next morning I drove back to the plant and took my truck to the local Ford dealership. They said that I should replace the head or install a helicoil and also replace the spark plug and coil pack. So I had them install the helicoil and replace the damaged parts. Less then a month later I was driving to work on the I 90 and I blow out the number 5 cylinder spark plug and this time it took out the plastic shield and ripped the spark plug and the coil pack off he truck. I have not done any thing but contact Ford Motor Company about this at this time. There suggestion was to replace the heads my self at a cost of 6,000 dollars.

- Lorain , OH, USA

After driving the vehicle approximately 10-12 miles, I parked it in the driveway. About fifteen minutes later my wife and I smelled smoke. When I investigated, I found engine compartment of the truck in flames. The fire appeared to have started on the driver's side of the engine compartment above the front wheel. Fire company was required to extinguish the flames. Everything forward ofthe firewall was destroyed.

- Selinsgrove, PA, USA

My 1999 Ford F150 was sitting in the driveway next to the house. Apparently it spontaneously combusted. It is now a burned-out shell of a truck. Fortunately, my wife was working from home and called the fire dept so the house did not suffer much damage. I did lose a few thousand $ worth of tools in the truck.

- Dripping Springs, TX, USA

The contact owns 1999 Ford F150. While driving at 55mph the vehicle shut down without warning. He took the vehicle to the garage. He was informed the motor head sending unit had to be replaced, but the motor head hole was defective because it was drilled too large.the garage was not able to replace the motor head in a timely manner. The total cost for repair was $700.the contact contacted the manufacturer. The manufacturer did not offer any assistance. The failure and current mileage was 130,000.

- Park Hills , MO, USA

I own a used 1999 Ford F-150 5.4L engine. It has approximately 117,500 miles. While driving on the freeway in California yesterday, I heard a loud knocking type noise. I pulled over to the shoulder and with the engine running opened the hood. Just as I did, the spark plug ejected from the cylinder head and came within 3" of my skull almost killing me. Took it right over to the power Ford dealer in tustin, ca. They want to charge me a diagnosis fee to tell me what I already know. I told them they better assure me that the remaining 7 plugs won't do the same thing or I may have been killed and a law suit would have been a definite. This is very dangerous and out of warranty so to speak, but it a unique problem all it's own. This has to lead to a recall. It is far to dangerous and in light of what has come up with Toyota recently we cannot allow these things, these serious danger to continue to be allowed to save Ford a few $. I am also going to write to congress.

- Tustin, CA, USA

I own a 1999 Ford F150, the sparkplug blew up as I was driving to work. I heard a loud pop.

- Cyril, OK, USA