FilthyLlama
NAXJA Forum User
- Location
- Montana
Howdy.
I have a 1990 Cherokee 4.0 Laredo 2 door. Bone stock. I've another thread on hear regarding the CPS, which I have fixed (mostly). I'm getting 0.8 vac on crank from the CPS. 195 Ohms. I've wired it directly through the firewall with it's own new set of wires and fitted it to the computer.
First question: Can anyone tell me which wire colors were A and B on the CPS connector on the wire loom side? I may have switched them around and would like to know for sure.
Second part: I still have no spark. I had spark, ran the jeep for a few minutes, then it just died and haven't had spark since... UNTIL TONIGHT. Went to get some volt readings. Hooked up the battery, had my brother crank the motor and SPARK! Surprised, we grabbed starting fluid, tried to start the motor... and NO SPARK...??
So: Tested OHMS on coil: Very low resistance on positive and negative primary posts on coil. 3.5 ohms I believe. The primary to secondary was 4300 OHMs which I think is very low (shouldn't this be 18000ish?), right? So I have another coil, it tested the same on primary, but to secondary was 6900 ohms. also low I think. Neither coil produces spark.
Also, I get 11.9 vdc to test point on Coil when it's mounted in the ICM. When it cranks, I get 7.9 vdc. Is that ok?
I've done all the renix things... ground refresh, added grounds, followed Cruiser54's info. Found a TSB about rerouting the CPS wires and such. Good battery. Musical Relays.
Can anyone give me insight on where to go from here? What to test? I refuse to throw parts and money at this without being able to test parts unless I absolutely have to do so. Almost to the BURN IT DOWN point.
Thanks!
I have a 1990 Cherokee 4.0 Laredo 2 door. Bone stock. I've another thread on hear regarding the CPS, which I have fixed (mostly). I'm getting 0.8 vac on crank from the CPS. 195 Ohms. I've wired it directly through the firewall with it's own new set of wires and fitted it to the computer.
First question: Can anyone tell me which wire colors were A and B on the CPS connector on the wire loom side? I may have switched them around and would like to know for sure.
Second part: I still have no spark. I had spark, ran the jeep for a few minutes, then it just died and haven't had spark since... UNTIL TONIGHT. Went to get some volt readings. Hooked up the battery, had my brother crank the motor and SPARK! Surprised, we grabbed starting fluid, tried to start the motor... and NO SPARK...??
So: Tested OHMS on coil: Very low resistance on positive and negative primary posts on coil. 3.5 ohms I believe. The primary to secondary was 4300 OHMs which I think is very low (shouldn't this be 18000ish?), right? So I have another coil, it tested the same on primary, but to secondary was 6900 ohms. also low I think. Neither coil produces spark.
Also, I get 11.9 vdc to test point on Coil when it's mounted in the ICM. When it cranks, I get 7.9 vdc. Is that ok?
I've done all the renix things... ground refresh, added grounds, followed Cruiser54's info. Found a TSB about rerouting the CPS wires and such. Good battery. Musical Relays.
Can anyone give me insight on where to go from here? What to test? I refuse to throw parts and money at this without being able to test parts unless I absolutely have to do so. Almost to the BURN IT DOWN point.
Thanks!