Today's update. I started it up and held it above 1500 rpm for about a minute. Let off the gas and it ran fine without stalling. Let it cool for three hours and started it again without my foot on the gas. It did not stall. I noticed that it initially starts at about 1000 rpm for 10-15 seconds, then drops to regular idle speed. Could a ISA or TPS malfunction make it stall when the computer kicks the idle down? I think the high initial idle speed is a normal emission function.