Use a code scanner to see what the computer says is wrong.
vacum leak
I had the same problem with my 1998 Explorer. I took it to the dealer and told them there was a miss in the engine. They said it was a glitch in the computerized software and they corrected it and it has been working fine since then.
Coil
crank sensor or cam sensor
check firing order
map sensor
try changing the spark plug wires also
I have a 99 Sable with the OHV 3.0 liter. I have the same problem. Things I have changed so far: the engine computer or (PCM) , the crankshaft position sensor, and the ignition coil. Still have NO spark to the engine. The spark plugs don't spark. I am still waiting for more info. Let me know if you have changed something I haven't. Thanks.
i have changed out the crank sensor, and spark plugs. also i have checked power to the coil pack and still have no spark to the spark plugs. i changed the coil pack as well. i have fuel and i get gas thru the fuel rail. any help.
check the cranck angle sensor in the front of engine if not working car never start
The first thing to check is that you are getting spark at the plug and if your not try changing the ballast resistor on the firewall, it's the white porceloin thing with wires running to it.
change your sparkplugs