2000 Mercury Mystique Repair Question
2000 mercury mystique turns over but will not start. seem to have this problem only on colder nights. why is that?
Answer
Rain or Shine do below
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
it doesnt appear to be fuel pump. can hear a slight hum. have reason to believe it is indeed the ignition module. on warmer days it does crank. it seems as if it has a mind of its own
If its the ICM don't matter cooler or hotter days it will not start