I am trying to finish up my 4.0 swap for my 93. I had the jeep running but a few days ago I tried starting it and the motor turns over but no spark. I have no spark after the coil or power going into coil. I have replaced the cps (crank), cps (cam), coil. I even linked 87 and 30 together on the ASD relay. I am getting fuel but no spark. I tried to pull the codes and I am getting a few codes. I think the one code is 53. I tried the search feature but nothing that fits my description.
93 YJ 4.0 AX-15 33's 8.8 with CJ front clip
03 F-250 Extended Cab Long Bed with 7.3
Yep as mentioned you get constant power from the ASD relay, mounted in the PDC. The ECM is responsible to keep the relay grounded ("ON") when appropriate.
It sounds like you have a break in the wiring, since the fuel pump also is powered from the ASD. You can confirm this is your only issue if you can supply fused power to the coil and then try to start the Jeep. The ECU supplies the ground to the coil, and breaks that ground signal to create the spark when needed.
So you bypassed the coil wiring from the ASD relay but you should try to find the problem, OR you end up with a rig that is nothing but gerry rigs!. Trace the coil wire at the coil back to the ASD relay or test that wire for continuity. I believe it goes to a splice. It could be bad at the splice.
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