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						Many things work the same way more or less. To me pretty much theory just is.. By rights this should be the 4th in a series.  Compression is the first test of all tests...  Spark is the 2nd test  Fuel is the 3rd test, and each of the above has a routine in order to follow, so you are not guessing.  Vac Leaks:  A...                                                        |  |  |  |  |