One problem related to engine failure has been reported for the 2003 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford F-150 based on all problems reported for the 2003 F-150.
1. Normal operation 2. Spark plugs are blown out of the engine head; this is the second occurrence; engine failure. Had the occurrence been 200 miles earlier, I would have been in the middle of peak traffic conditions on i405 near bellvue washington state, heavy rain with poor visibility - consequences would have been dire. 3. Ford acknowledges that they know of the problem. The service manager at the local dealership indicated that they have had a "ton" of these repair jobs. At $400+ per occurrence, I question why they haven't done anything to protect the consumer? why no notification of the problem. I'm told there have been service advisory's issued, but shops and service counters share none of this with me. Now that my vehicle is 5 yrs old with 129k miles, what will the frequency of this problem be. As the f150 fleet ages, how many more occurrence will there be prior to food issuing a solution? I'm told by dealerships that the spark plug seat only consists of a few thread to hold the spark plug in. Plugs do not have a seat ring (compression ring) to assist in the plug to stay seated. As the plug loosens, blow by occurs and eventually blowing the plug out through the treads in the engine head. I've never heard of such a problem, let alone having this occur to my twice. Parts houses had concurred that the problem is prevalent and they laugh about it. Who is going to laugh when this known unsafe engineering flaw causes death or injury? their repair has not resolved the problem, nor did they give up this information without me first seeking factual information. The public is being deceived!.