02 Taurus cranks but won't start
#53
Trying to get a look at a diagram for your vehicle , having a heck of a time.
One diagram shows the wire to the coil as whit/blu another shows it as red.
In any case there should be only one wire at the coil plug (when unplugged) that when the key is on, should measure battery volts. If you have that , half of the check is done. The other half is to leave the plug off the coil pack and any one of the other wires that come from the PCM to ground one of the coils should have no ground connection until the engine is cranked and the PCM grounds that coil to fire. Even if only one coil works the engine should attempt to start. If nothing happens there the PCM is suspect after the power and grounds have been verified.
One diagram shows the wire to the coil as whit/blu another shows it as red.
In any case there should be only one wire at the coil plug (when unplugged) that when the key is on, should measure battery volts. If you have that , half of the check is done. The other half is to leave the plug off the coil pack and any one of the other wires that come from the PCM to ground one of the coils should have no ground connection until the engine is cranked and the PCM grounds that coil to fire. Even if only one coil works the engine should attempt to start. If nothing happens there the PCM is suspect after the power and grounds have been verified.
#55
I don't know if Bill is doing anymore today because he may be working outside and the temp is dropping and it's getting dark AND He probably has had it for today. He has a good one here and if we can help get it straightened out , he's going to be one happy camper.
#56
Mine is automatic
If it is the PCM then I am just out of luck. I am broke and my pay checks for the next month are spoken for. Not sure how I will ever get back on the road if it is the PCM.
#59
Until you actually verify that signal from the crank sensor is getting to the PCM we don't know where we stand. If that wire is open anyplace we are not sure it is OK. The only other way we might verify this is by checking at the coil for power and the signal from the PCM to fire the coils, (Provide the ground while cranking & running).
Last edited by hanky; 01-12-2014 at 05:40 AM.