Help car doesn't start

[Satoru Ohta]

WTF!
I went this afternoon to look at my car.  It didn't start again.  When I
cranked up, it idled fine, but when I pushed the gas it would rumble and
stop.
I didn't have time so I called a tow truck, it came and took it to the
dealer.  When the truck dropped the car at the dealer yard, and I
cranked, it started!!  Reminded me of children with doctors...
Well it started but idle was jumping around and trembling a lot, so I
decided to leave it there to get it scanned..

Thanks guys for your inputs.

Sato