Hello I have a '93 mercury sable w/ a 3.8ltr and I cannot for the life of me get it to fire from the coil I put a new coil and ICM on it tested the leads to both of them and is getting power to them both but the coil still refuses to fire and i cant figure out why can some one help me. Dave
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MAke sure its in park( just move it though the gear shifts) sometimes the neutral switch gets sloppy age/usage/transmission swap etc. Check for voltage at the coil positive terminal when the ignition key is on. YES there is voltage, the problem is on
the trigger side of the coil (pickup, crank sensor, ignition module or
primary wiring circuit).
If there is NO voltage at the coil, the problem is on the supply side (the ignition switch or ignition wiring circuit). Check Relays and Fuses.
I would try a spark plug first (cheapest) about $5 for a platinum plug. I would see if the spark plug is firing before putting it in. Pull the spark plug wire off of existing plug put it on the new plug and ground the plug. Crank over or start the engine, is it firing? If not spark plug wire would be the next cheapest. You may be able to get just one wire, but I would replace the whole set. If it still is not firing the coil pack is probably bad about $60-70. If it is firing in the above steps it could be the injector is not working. You could drive the car as is, but it would drive me nuts, I can't stand something that doesn't run right. You will naturally be low on power and probably not doing your gas mileage any good either.
Hello Loren. There are two different engines on the Sable that year. Both 3.0 liters but one has a dual overhead cam engine. I'll go with the more common single overhead engine. Squeeze the tabs to remove the ignition cables from the top of the coil. It would be a good idea to mark which one goes where first. Then undo the capacitor connector. Undo the four retainer screws. Reverse to reinstall. Apply a film of di-electric grease to the coil towers before you put on the coil wires.
If yours is the dual overhead cam, let me know here in comments and i will give you directions.
what engine? 3.0L 2 Valve? 4 Valve?
3.4L SHO engine?
The PCM (engine computer) fires the coils, but it is never the cause of a problem. I suspect it is the crankshaft position sensor on the front of the engine by the crank pulley. easy to change.
Crankshaft Position Sensor
The crankshaft position sensor (CKP sensor) (6C315) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper.
The signal generated from the crankshaft position sensor is called the crankshaft position (CKP) signal, which provides base timing and crankshaft speed (rpm) information to the ignition control module (ICM) (12K072). Base timing is set at 10±2 degrees before top dead center (BTDC) AND IS NOT ADJUSTABLE. The powertrain control module (PCM) (12A650) will use this information with the spark advance information to determine ignition coil (12029) turn on or turn off time.