So are you saying that i should go and buy another CPS? I just bought the first one on monday when this problem showed up. Its not the easiest part to get to on the jeep, but I can always take it back and say it didnt work. I tried to test it by backprobbing it and getting some numbers, but i was un succesful i couldnt tell if my probing was hitting any wires.

 

three basics for a motor to run are air, spark and fuel which of these are not present is what needs to be verified then yu can start diagnostic work

 

pretty sure he already mentioned hes not getting spark

 

did you check to make sure there grounding still

 

i dont see it posted

 

says no fire out of coil

 

where did theses wires bolt to

 

The coil is bolted to the block. The ground wire runs from the battery to the block just under the coil, to the body beside the battery and it is also secure from the head to the body under the windshield. Air well I can run outside and put my hand over the intake and crank it if you would like, but I assure you it is just fine. I have never heard of a plugged air filter throwing a p1389 code. I really am not trying to be a jerk here I promise, but we have already established that there is no spark.

 

just a thought ...have you tried to start it in Nut. not Park... if it is an auto

 

did you do this

 

http://www.justanswer.com/jeep/1d5jn...-shutdown.html

 

just a thought ...have you tried to start it in Nut. not Park... if it is an auto

Yes I tried that and to wiggle it back and forth. The only thing it did was stop the starter from turning over and the when i placed it back into park it started to crank again. Just didnt start.

The ground wire runs from the battery to the block just under the coil, to the body beside the battery and it is also secure from the head to the body under the windshield.. I have removed each of these grounds, checked the wires and then installed them again.

 

so youve tested them with a meter for cont or stripped all the plastic off and checked for breaks that would be testing them for ground read the link i p[osted should help

 

http://www.justanswer.com/jeep/1d5jn...-shutdown.html

 

Ok so most of today was spent on the jeep. I ran the tests that free sent me the link to and am now still without a running jeep. I am still not getting any voltage to the coil. I checked the continuity from the coil wire (green with orange strip) to the computer which is plug 12 in the grey conector and it is good. I am getting voltage into port 3 of the plug so I know power is getting into it and for some reason the asd relay is not letting power to go to the coil. I have checked and there is power at the asd relay but it will not open the relay and allow power to flow. I am not getting any readings between plug 30&87 which are power to flow to the coil. So for some reason the computer is not allowing the asd switch to kick over and let it activate. It just clicks when you try to start it. Since monday I have replaced the Battery,CPS,Coil,ALl the relays, Checked all the fuses, and also checked the grounds. I also pulled the fuse box that is under the hood apart to make sure all plugs were in the spot and not corroded, and all are in good shape. So all of that pointed to the computer. I also have a 96xj and an extra computer from a 00. So just for giggles i walked over and started the 96 and then unplugged the computer and then plugged my 99 computer in and it started right up and ran just fine. So I then plugged in all 3 computers into the 99 to see if anything would change and nothing did. Still no voltage to the coil. So...... Where do I go from here? (also all my guages work just fine and my neutral switch on tranny functions properly)