91 yj 2.5 has no spark at coil

[Brandon.otey1986]

My 91 wrangler has no spark at the coil but has 12v going in. I have replaced the coil, and has a new crank position sensor. I can hear the fuel pump run and the check engine light comes on when I turn the key on then goes off. I’ve cleaned all the grounds I can find. I’m sure until of ideals not sure what else to check. Any help would be greatly appreciated

 

[machoheadgames]

It always has 12V when the key is on because of the ASD circuit. The computer pulses the ground of the coil to fire the spark plugs.

Bad ignition pickup coil (cam position sensor) maybe? I dunno. PCM seems fine based on the fuel pump priming and the CEL coming on.

 

[Brandon.otey1986]

I replaced the cam sensor and it’s started for a couple days so hopefully it’s fixed. Thanks for your help

 

[Stoopid Jeep]

Have you checked for trouble codes?

 

[Brandon.otey1986]

When could checked the codes I had a code for the cam sensor that seamed to fix it thanks for your help