After running the truck for only a minute, the O2 volts are pegged at.9, the dwell is 101%, the idle mixture screw is turned out to completely lean. In addition, the only adjustment is the idle air mixture with this system. I do have the software to monitor the dwell. The only time my O2 volts drop is when the engine is under full rpm at full load with a deadheaded tilt. My O2 volts drop to.2 and the dwell creeps down. As the dwell creeps down the O2 volts creep up closer to the.5 that is desired. Everything is pointing to the LP regulator. I cannot seem to get the info on the OEM cobra that came with the truck compared to the Cobra that is currently installed. Cat wants $200.00 for the OEM lp regulator. Before I buy it I would like to know there is a difference other than the cover.

Thank You everyone for your input so far.