the alcohol is burned, therfoer gives off heat, the amount of coiling that 5% alcohol would have is minimal at best

when a car idles and dies after 10-15 seconds it can be lean or rich, the best way to test is to get it up to running temp (as i mentioned in the article) and then let it idle for 30 seconds then floor it, if its slow to react then tune accordingly

if you lean the hsn, the lsn leans out by a small degree too

if the low end is lean, at idle, it will shut off without even lowering the tone, its running, then its not