I have a 1999 chinook class C with a Ford E-350 chassis powered by a Triton V-10. Shortly after buying it used we had a spark plug pop out. It was an original plug. We had them changed and took a cross country trip. As we were coming up on memphis tn. Another plug blew out. We were on an interchange in a very dangerous place. We could not get out as there was a freeway on both sides. It took 3 1/2 hours to get us out of harms way. Just last weekend it happened again though I drove off the freeway. I have since read that this could cause a fire as the gas is getting pushed out the plug hole and the plug is out and firing. I have done some research and Ford says the plugs were not torqued to spec which caused it to happen. We had our original plugs when it 1st happened. I also read online where a dealer had a very low mileage V-10 with original plugs and it happened to him. I think these heads are defective and should be replaced. I cannot find aftermarket heads so I would feel safer. It has always happened going down the freeway. The mechanic at the shop where it is says he has a Ford kit to repair the heads. He says it is the only kit for this he has ever seen yet Ford denies there is a real problem. I just feel lucky I have been able to get off the road each time. These engines are in many rv's and larger trucks which are harder to maneuver I.e. more dangerous.

- Laytonville, CA, USA

1999 Ford E350. Consumer states that while driving he noticed smoke in the cab and the engine started to die. Consumer pulled over the vehicle became engulfed with flames. The consumer believed the fire started in the engine. (Ohio traffic crash report)

- Toledo , OH, USA

During normal town driving, a spark plug was blown from passenger-side engine head, second from closest to passenger compartment. No prior issues with engine. Plugs not recently replaced. No obvious tell-tale signs that failure was immanent. Vast majority of vehicle's 140K mileage was long run on interstate. Threads were stripped, ignition coil was destroyed. No information from Ford regarding how to fix, other than a dealers suggestions to replace head or replace engine. No information on Ford web site.

- Blacksburg, VA, USA

Had an engine failure while towing a boat. Had brakes but no power brakes. This happened on July 30, 2005. The service engine light came on and a few second later the engine failed. The module that controlled the fuel injection failed. There was a hole coin the back of it, and it affected the whole engine. Water dripped out of the part when the mechanic took it off.

- Richfiled, OH, USA