My 1997 Explorer will not start. 4.0 SOHC. The fuel pressure at the rail is 40PSI, replaced crankshaft sensor and visually checked fire at plug and coil. Spark was not blue. The truck tries to start after it sits overnight but will not start and run. What could be the problem? Does the lack of blue spark indicate a weak coil? Could all coil packs go bad at once?
May 19, 2012 at 9:39 AM