RATING: Recommended; this is one of the best full-sized pickups for 1993. GENERAL COMMENTS: F-series full-sized pickups are easily the best selling vehicles in North America. This sales lead has existed for an unparalleled ten years, and will probably continue, although Chevrolet is gaining ground. Not much is new for 1993, but there probably doesn’t [...]

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If the cylinder balance test indicated there might be an internal mechanical problem, the spark plugs are removed and a pressure gauge is inserted into each spark plug hole, one cylinder at at time. When the engine is cranked for a few seconds, the gauge registers the compression developed, and can precisely indicate weak cylinders [...]

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