I am not getting any voltage to the coil. Checked the fuses they are good.Should the coil have power when the key is on?
Thanks

 

Check the ASD relay. That powers the computer which powers the coil. With key on engine off no it should not have voltage.

 

Replaced ASD CPS and still no spark any Ideas?

 

Cam Position sensor is your next spot. Also you could check the ground by splicing into the computer ground for the coil and grounding it out to the frame if you get the coil on than, your issue is computer related if not spare coil related or alternator related.

 

From what I have read Cam Position sensor controls fuel injection.If the ASD energizes should I have power to the coil?

 

if there is no signal from either the crank or cam sensors. It will not ground out the coil causing it to not get a spark. I had an issue with the crank sensor skipping odd holes and caused me many headaches until i replaced it. Than it ran so good. Cam sensor can do the same thing.

 

but when the key is on should I have power to the coil? does the computer wait for both signals before it turns on power to the coil and injectors
Thanks

 

you will only get power to the coil when the sensors are activated. So you won't know unless it's being turned over. Coil is not on continuously.

 

I just looked at autozone and advance they do not list cam position sensor for 3.9 lost........

 

Hey Dinger any luck yet ? I have a 99 dakota 3.9 cranks but no spark from the coil