Venompower
Active Member
I took the Cobra for a pretty decent drive yesterday, outside temps 86 degrees, and decided on the way back to roll up the windows and turn on the AC. Noticed that my coolant temps which generally sit around 200-205 on a hot day got up to 218. Was nervous about this and shut off the AC and rolled the windows back down. This leads to a few questions...
1. In my main build thread someone mentioned that once the AC is charged, you need to disconnect the battery for like 30 minutes, then reconnect it and let it run 5 minutes no AC and then an additional 5 min with AC on MAX so the PCM can learn to idle with the AC running. I admittedly have not done this since charging the system and if I turn the AC on at idle the rpm's go up and down pretty erratically. Could this coolant temps be caused by the PCM not raising the idle enough, causing the water pump to run slower with the additional load? This happened in town with lots of sitting at stop lights and in traffic?
2. Could this be caused by the system still being on the low side of charged, requiring the compressor to run more frequently that it should?
3. Is this normal and I'm worried for nothing? I researched the coolant temps for the SN95 Cobra and saw a lot of posts saying this is potentially normal especially with AC in stop and go traffic.
1. In my main build thread someone mentioned that once the AC is charged, you need to disconnect the battery for like 30 minutes, then reconnect it and let it run 5 minutes no AC and then an additional 5 min with AC on MAX so the PCM can learn to idle with the AC running. I admittedly have not done this since charging the system and if I turn the AC on at idle the rpm's go up and down pretty erratically. Could this coolant temps be caused by the PCM not raising the idle enough, causing the water pump to run slower with the additional load? This happened in town with lots of sitting at stop lights and in traffic?
2. Could this be caused by the system still being on the low side of charged, requiring the compressor to run more frequently that it should?
3. Is this normal and I'm worried for nothing? I researched the coolant temps for the SN95 Cobra and saw a lot of posts saying this is potentially normal especially with AC in stop and go traffic.