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Message: <blockquote data-quote="Phatboy" data-source="post: 1173901" data-attributes="member: 18419">The factory balancer can possibly slip on the rubber insert.Setting timing with a spun balancer will cause incorrect timing.  Generally when this happens the rubber insert will be sticking out farther in one place than the rest, but not always. This could cause all kinds of issues including but not limited to:detonationpoor performancepoor fuel economyno start condition (if it slips far enough)poor idlemissing--------------------------------------------------------------------------------------------------------------------------------------------------TFI (Thin Film Resistor) module, aka ignition module overheats and burns out.  It is located on the passenger fender just in front of the strut tower on 94-95 year models.  It is bolted to an aluminum finned heat sink, and REQUIRES DIELECTRIC GREASE BETWEEN THE HEAT SINK AND MODULE.  Problems with the TFI are very similar to problems from the PIP going out:No start conditionMissingPoor idleNote:  The TFI can be tested at a reputable auto parts store, but have them run the tests at least 3 times.  Usually the TFI needs to get hot in order to fail.  Running 3 tests on a good TFI will yield passing results, on a bad one it will fail.  Note:  The TFI module requires a special Ford tool to remove it.  You can find this tool at some reputable auto parts vendors in the special tools section. Its called...wait for it....Ford ignition module tool. You can also shave down a deep well socket.  Standard sockets are too thick.  I believe the size is 3/32" but this would require verification. --------------------------------------------------------------------------------------------------------------------------------------------------</blockquote>