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I've seen this about five times now and wonder if others have seen the same thing.

I have have the sg set to gas for fuel as I don't do FAS and figured that was a good as anything

Today's event was I stopped at a traffic light and turned the engine off. I did not know how much longer the light would remain red, but I was far enough back in line I knew I'd have time to start the car before I had to get moving. Well I only had it off for a couple of seconds when the light turned. So I started up the engine. About a tenth of a mile later I notice that the scangauge is not on. I start it and all it fine.

The other times I have seen something similar I have been stopped, get into the car and look at a few numbers on the scangauge. Then I start the car. Again a short time late I notice that the scangauge is not on.

What I think I am seeing is a time delay issue. If the scangauge is not off long enough then it will not come on when the engine is started.

I'm wondering if others have observed the same issue and if setting the fuel to hybrid will solve the problem.

Hybrid will solve that. That's really the only difference. They should make Hybrid the new standard Gas mode for everyone, since it works just the same if you never FAS.

Every now and then it doesn't come on when I start the car.

I jiggle the cable and it usually comes on.

Now, that sounds like there might be a short in the cable.
However, it never turns off during the ride. I would think that if it was a cable problem, it would have just as much of a chance to turn off while driving than it would not to come up when starting the car.

Weird.

-Mike

After it goes to sleep, it doesn't necessarily wake up just
because an engine has come back on because while it's asleep,
it's not *watching* the diagnostic port and can't tell. I think
what triggers the SG to power up is a change in supply voltage,
or you poking the button. Hybrid helps with this in that if
it's still able to retrieve information at all, it stays on.
At least I think that's how it works.
.
Wiggling the wire might be causing tiny momentary drops in the
power lead, causing the voltage trigger. That might mean the
wire's flakey or just that your diag port has dirty pins...
.
_H*

I very much doubt that it is a bad connection. It has never gone off while driving. I fairly certain the only time it has not come on is when it has been off for a very short time when I start the engine. I had already concluded that from the last couple of times it had happened. It is so rare that the only time I've ever known it happened is after I've driven a tenth of a mile or so and realize that it is not on. Hitting the start button works every time.

My best guess is that it is something in the sg shutdown system. If I hit the starter at just the right instant it misses the message that the engine is on - probably because it is in the process of shutting down at the time..

mine comes on but doesn't always give me useful data on my aFE xguage turning off the car doesn't always help but unplugging and re plugging always works

One day I got into my car after it's been sitting all day, turned it on and the sg remained blank. I just pressed one of the buttons on it and then it popped on.