Here's what pulse 'n' glide will get you.

[Intrigued]

Originally Posted by Piwoslaw

...those two thing could/should be coordinated? If I want to P&G my A/C, then is it better to turn it on while while the car is already under power during a pulse, or when I'm coasting in neutral? I turn off the A/C when I really need power, like uphill or passing a truck, and turn it on when engine braking. But during P&G in normal conditions when is it better to put an extra load on the engine?

If I am in traffic, and can't really P&G, I turn my A/C off going uphill, and work hard to keep my torque converter locked in. I turn it on as needed going downhill, especially if the hill is too steep and I need the extra braking.

When there isn't a lot of traffic I run the A/C during a neutral coast, but I may have to try using it during the Pulse. Sometimes it's real easy to assume one way works better...

[Clev]

I figured that the added load of A/C would be minimal at higher throttle inputs, since the engine runs more efficiently there than at idle. The vacuum gauge drops noticeably (1.5 in. hg.) with the A/C running at idle, and somewhat less while cruising at 60, but while accelerating, it doesn't make a noticeable change at all.