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Jeep Wrangler YJ
YJ General Discussion
Engine cutting out after warm up
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<blockquote data-quote="HDSlowride" data-source="post: 432337" data-attributes="member: 19912"><p>Trying to keep this thread up to date. I did remove the thermostat housing and was correct in that there was no thermostat. Cleaned everything really good and put in a new 195 degree thermostat. The heater does work after I coaxed the fan motor back to life. While I really thought that was the issue...It did not cure the engine miss after it warms up. Still the same...runs good cold for about 8-10 minutes and then starts missing and backfiring after it warms up.</p><p>I have a new coolant sensor that I will try next....then I think I will change the CPS. I also have a new coil that will go in next if these fail to improve. Unfortunately, I have another issue that will take me away from this hobby for about 5 weeks so hopefully I will be back on this thread in December. I don't want to abandon it as it may help someone else...assuming I eventually get to the bottom of it. Maybe the Powertrain Control Module (ECM) needs that repair that I have read about. Some guy (on ebay maybe) replaces a couple parts on the circuit board for $64 or something??</p><p>It still seems to me that something in a sensor circuit, or the ECM, is causing it to lose fire intermittently.</p></blockquote><p></p>
[QUOTE="HDSlowride, post: 432337, member: 19912"] Trying to keep this thread up to date. I did remove the thermostat housing and was correct in that there was no thermostat. Cleaned everything really good and put in a new 195 degree thermostat. The heater does work after I coaxed the fan motor back to life. While I really thought that was the issue...It did not cure the engine miss after it warms up. Still the same...runs good cold for about 8-10 minutes and then starts missing and backfiring after it warms up. I have a new coolant sensor that I will try next....then I think I will change the CPS. I also have a new coil that will go in next if these fail to improve. Unfortunately, I have another issue that will take me away from this hobby for about 5 weeks so hopefully I will be back on this thread in December. I don't want to abandon it as it may help someone else...assuming I eventually get to the bottom of it. Maybe the Powertrain Control Module (ECM) needs that repair that I have read about. Some guy (on ebay maybe) replaces a couple parts on the circuit board for $64 or something?? It still seems to me that something in a sensor circuit, or the ECM, is causing it to lose fire intermittently. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Engine cutting out after warm up
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