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  1. R

    Ignition issues on 1990 Jeep Cherokee Laredo 4.0L

    ok guys, as of right now, I have not driven it anywhere but it is starting reliably. I checked the resistance on the new CPS and it was reading 208, so I plugged it back in and tried to start it. It turned over but still no spark. My room mate un-bolted the ECU and pulled it down into the foot...
  2. R

    Ignition issues on 1990 Jeep Cherokee Laredo 4.0L

    At this point I'm pretty sure it's wiring and or ground. The CPS is new, as are the currently installed ICM and Ignition Coil. Later today or tomorrow morning I will be replacing all the grounds with 4 gauge wire.
  3. R

    Ignition issues on 1990 Jeep Cherokee Laredo 4.0L

    I have 4 ignition coils that I have purchased over the last 4 years, three test identical, and one tests almost the same as the other three when testing with a multimeter based on the haynes manuals instructions. There have been times when I tried the 1 or 2 spares that I had on the shelf, and...
  4. R

    Ignition issues on 1990 Jeep Cherokee Laredo 4.0L

    Hello Everyone, I have a 1990 Jeep Cherokee Laredo 4x4 with the 4.0L motor and NP242 transfer case and 4 speed automatic transmission. Every six months to a year for the last 3-4 years I have had to play musical coils to get the car to run. I have 4 total now that all test the same or very...
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