I am having some problems with my intake manifold temperature sensor, etc, but the audible alarm for it may also be an issue. First, I was getting the alarm but none of the log data recordings showed a high temp. On the Max Gauge I did show 210 degrees. Here are the questions. Does the alarm activate if an instantaneous reading exceeds limits? If the alarm is set to sound every 15 seconds, does it do so until the program is shut off after the limit has been surpassed? I changed the limits during a trip with the system on. Does this take effect immediately or do I have to turn the program off and then on to activate the new limit? The audio alarm would not stop until I turned the program off once I surpassed the limit. I even had the JIB connection unplugged from the computer at the time. Thanks. Jim Walker Northern Virginia