I have a 258 4.2L '78 CJ5. Engine cranks but will not fire. Carburetor squirts fuel. I have replaced the entire wiring harness with a direct replacement from Painless wiring. The engine started and ran no problem before I replaced the wiring. The old wiring did not include the external resistor but the new kit did, so I installed it. I cannot find any part numbers on the coil, so I do not know what I have. I measured 12 volts to the coil. I measured the resistance of the coil between the two posts and got 1.2 ohms. I took off the center wire from the distributor and placed it within 1/8" of some exposed metal on the valve cover, but I did not see any spark. I am suspecting a bad coil. I also noticed that when I left the key in the "on" position for 15 -20 minutes, the ignition module became very hot. If I can get a decent wiring diagram with voltage and resistance values that would be very helpful! I have attached photos to show you what I have.
have the same problem?
Friday, December 4th, 2015 AT 9:59 PM