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You should run a cylinder leak down test instead. If you run a compression test, you take out the spark plugs connect the pressure gauge to the engine in the spark plug hole and crank the engine. You want to make sure it does not start. Disconnect all the coils or remove all the spark plugs. NOTE that each cylinder may have different readings and this is normal. You are looking for big variances. It wont tell you if it is valves or rings though and a leak down test will.
These cars are notorious for there ECU/ TCM issues. Sometimes disconnecting them from the harness and applying some dielectric grease to them helps, other times replacing them fixes it. on rarer cases I have seen bad wires and faulty connectors. The end synopsis is that you are going to have to take a few hours and hunt down the delinquent connection and make a simple wire splice.
thottle, cam or crank position sensor. is the engine light on, if so buy a OBDII code reader
comes with a book that tells you what codes are
costs about the same as taking it to a shop once
for a reading.